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model roundup

Opus 4.8

241 items · started 2026-05-26 · ongoing (last activity 2026-06-26)

  1. caught myself doing it in standup yesterday. someone asked when the migration lands and before i even thought about it i went "great question" and paused like i needed to gather context.

  2. I haven't been able to use Opus 4.8 on claude for the past few days. Even with a simple 'hi' I receive a message saying that it exceeds Claude's context limit.

  3. Hey everyone, I've been working on a B2B SaaS project for a few months now using a "vibe coding" approach. I had a pretty solid workflow going, but I just hit a massive bottleneck with context management and could really use some advice on…

  6. Hi all, I saw alot of posts complaining claude would opt out of doing something and tell me “Go to sleep”, “You are tired”, etc responses, I never encountered that, I assumed bc I never complained about being tired or sleepy but lately it…

  7. Everything runs locally in your browser using custom WebGPU kernels written by Fable 5 (before it was shut down) and Opus 4.8. The video was recorded on my M4 Max.

  8. I've almost completely paused all my vibe coding projects since Fable 5 was cut off. What's the point in continuing to vibe code when we know there's another model out there that is going to smash through stuff better than Opus 4.8?

  9. Using Opus 4.8 Max Thinking with claude code on my VPS, coding a "simple website" that tracks expenses and income with different levels. The code produced by claude is buggy, I add one feature and 3 new bugs come out, some that were alread…

  10. I whipped this up the other day and it has lived in a window on my monitor since then. It is nonsense-free (no gags, no jokes, no chatrooms, no junk) and there is an optional email list to get pinged right when it goes live (and then nothi…

  11. The frustration most people hit is that Claude remembers your conversation perfectly, right up until you switch to Claude or Opus 4.8 for something specific. Then you're starting blank.

  12. An Open-Source IDE Built for GLM GLM 5.2 is compelling for a simple reason: it gets unusually close to Claude Opus 4.8 in quality while sitting at a much lower cost point. stagewise gives it a local IDE built for long-running agent work.

  13. So I woke up to this change which wasn't there when I went to bed last night. Which one do we chose?

  14. Opus since the last weekend feels worse then sonnet, it does not even recognise it's own skills until you explicitly scream at it tell it.

  15. I have been thinking about the Fable 5 to GLM-5.2 sequence as one event rather than two. June 9, Anthropic ships Fable 5, the Mythos line opens to the public for the first time, SWE-bench Verified at 95 percent, people calling it the best…

  16. Welcome Back Everyone, Week 1.5 update: Claude-led execution phase. Over the last 1.5 weeks, Claude helped turn the plan from a idea into measurable execution, with the unfortunate demise of Fable and the block from the US government, we h…

  17. Haven't seen this before - using Opus 4.8 in the Claude desktop app and got a response with random Chinese (or another Asian language) in part of a response: "The valuable thing isn't a搜索able quote bank....". I'm trying to think through wh…

  18. Hope Fable 5 can help me find it, Opus 4.8 is just dumb.

  19. This one is close on the aggregate, but the split tells a clear story: Gemini 3.5 Flash wins by being more disciplined about format and slightly sharper on practical instruction-following. Claude Opus 4.8 lands the strongest single extract…

  20. Region: Germany I'm currently using Claude Opus for a project (not code related). When I tried to adjust the thinking effort for Opus in my active chat, Claude Fable suddenly became selectable.

  21. A lot of repetitive LLM work (classification, routing, extraction, pulling fields out of tool results) gets sent to frontier models when it doesn't need to be. tunelab moves those calls onto small models you fine-tune on your own data, loc…

  22. Honestly, I do want to say I never got the hype behind Claude till I actually tried it. I'm comparing it against Gemini and Copilot (ugh).

  23. constructive take, not a doom post. for those few days Fable was up i restructured how i work around it.

  24. Subscribe to updates for Elevated error rate on Claude Opus 4.8 via email and/or text message. You'll receive email notifications when incidents are updated, and text message notifications whenever Claude creates or resolves an incident.

  25. serious question, no judgment either way. i dont code.

  26. It’s not about the actual words. SEE MAJOR UPDATE AT BOTTOM TL;DR: It’s not the meaning, it’s not even “unsafe words”, it’s COHERENCE.

  27. be honest. when Fable 5 was up for those few days a lot of us rewired everything around it, then it went offline on the 13th and we all got dumped back onto Opus 4.8.

  28. after reading about the guy whose 5 hour session ate 15% of his weekly allowance i got paranoid and actually built some guardrails. sharing my setup, steal what helps.

  29. Two great AI coding skills already exist: Ponytail (minimal code, YAGNI-first) and Caveman (terse prose). We didn't build 🍯 Honey (I Shrunk the AI) to replace them, we merged what each does best and added a third lever they don't have.

  30. A couple weeks ago Opus 4.8 discovered "bite" as a substitute for "makes an impact", "activates", "applies", etc., and now I see it several times a day. Rules bite.

  31. This Opus 4.8 Max... Unsure how I brought on this keen level of snark, but aside from being terrifying...

  32. Trying to use up my weekly Claude usage and just going through code review loops using Codex. You can see Opus 4.8 is clearly getting frustrated with the pedantic comments it's getting.

  33. A while ago when the F1 season started I realized I hadn't even known about it. Then I started feeling that there were just too many things happening that I didn't know about, so I decided to build a website to crawl and display events tak…

  34. Recently asked it the following question: "Here's another idea, in a region where water is scarce, I'm contemplating a fine weave fabric that air can pass through to trap moisture. My idea would be treating the fabric with a hydrophobic su…

  35. Quick context: I've been building agentic loops that edit my short-form videos for me. The editing works really well, but I found myself needing to check the process at several gates.

  36. https://preview.redd.it/53xrq5hvv39h1.png?width=1776&format=png&auto=webp&s=5ac6b171b84e6ebc94d8326699f23af23fd75177 Noticing a lot of my convos with opus 4.8 are starting with safety flag mentioning... this wasnt there a few days ago, won…

  37. got tired of guessing so i put it on one page. haiku for the grunt work, sonnet for most real stuff, opus 4.8 only when it actually needs to think.

  38. I was lucky enough to use Fable 5 in that short window that we had. It built me an ios app to solve my own problem.

  39. During the ~48hrs that I had access to Fable 5, I decided to have fun with the Xash3D-FWGS engine for Half-Life 1, starting with a "level streaming" system (pre-load the whole campaign, its only ~500MB anyay). After that was working, I suc…

  40. could not extract summary

  41. Which model and effort level is gonna give me the best "bang for my buck" results when it comes to writing in general, stories, explanations, but especially resumes and cover letters. Of course highest models like Opus 4.8 on max thinking…

  42. RiseLynk is my product, and I built it with a lot of help from Claude. I'm an elevator mechanic.

  43. Sonnet used to have this title... ‌

  44. Hi new here , I've been using opus 4.7 extra / max on app on phone for my project. Really enjoyed seeing the extended reasoning behind every response.

  45. I bought Claude pro, but I think I have been using it really inefficiently and as a result, burning through my 5 hour limit quickly. I've been doing everything on opus 4.8 Max effort with thinking enabled, but I think this might be overkil…

  46. Quake has been ported to the web plenty of times, so that part isn't new. But I experimented with the GitHub Copilot app and Claude Opus 4.8 to take id Software's original source, compiled the software renderer to WebAssembly with Emscript…

  47. I have started with Claude a few months ago. Been really impressed with cowork and code and used it to write tools and functions for me.

  48. Was debugging my TTS pipeline and doing some research on natural voice options, and Claude Opus 4.8 mentioned its training cutoff is January 2026. But the model launched on May 28, 2026.

  49. Which option gives the most actual Opus 4.8 usage volume: Kiro Pro, Claude Pro or something else? My monthly budget is $30.

  50. I’m currently on the pro version. Considering cancelling because of how much it’s gone downhill.

  51. could not extract summary

  52. I’ve been collecting tick data and level II data, options chain data, etc for about a month now on the NQ and ES futures contracts. I also have 16 years worth of 1-minute OHLC NQ data.

  53. This morning I used Opus 4.8 to spin up a very simple landing page that auto-checks every 60 seconds if Fable 5 is back up. Took about 25 minutes of tinkering, grabbed a Cloudflare domain and just piggybacked off of another of my project's…

  54. CLAUDE MAX 20X $200/MO $20/MO Same Opus 4.8. Same prompt size limits.

  55. I was in here yesterday showing someone a screenshot that 1M Opus was still available. I have still used 0% Sonnet.

  56. I’ve been using Claude to walk me step by step in a DIY electronics project, going back and forth with it on every simple thing, and it has been amazing at that. The last two prompts (opus 4.8 high) just took my max 5x usage from <20% to 1…

  57. Experiment that I've made. The models get access to an E2B sandbox and are instructed to create an ad according to the specifications (they can choose whatever tools they want to use for it, e.g.

  58. I thought Opus 4.8 was just as dumb and paternalistic as GPT 5.2 when it comes to safety. Spent hours in a research session where he kept throwing helpline numbers at me on a loop like a broken vending machine.

  59. Just a humorous post my admin

  60. There is no Chinese anywhere in this project... Are we compromised?

  61. I know frontier labs keep their flagship sizes top secret, but I'm curious what the current engineering consensus is.

  62. I was on Opus 4.6 which was great for me and decided to make what I though was an upgrade to Opus 4.8. And man was I wrong, this thing is irritating me so much.

  63. I'm getting this dispatch error and can't clear it: Failed to authenticate. API Error: 403 [model_blocklisted] Claude Fable 5 is not available.

  64. Opus 4.8, thinking on, Extra effort, asked it to produce a list of the legal status of a specific drug in every country in the world. Spotted this little gem in the thinking text bubble that shows while It's preparing an answer.

  65. About an hour ago, I gave Claude Opus 4.8 a 300K-context task in Cursor and stepped away. When I came back, Cursor showed this message: “You’ve used 100% of your included API usage.” And just like that, 30% of my Ultra subscription was gon…

  66. TL;DR There's been a lot of hype around GLM 5.2 being a cheap "frontier killer": good enough to replace Opus 4.8 / GPT 5.5 for most coding work, just by swapping it in. On these 50 tasks it finished last on quality in both repos – and it's…

  67. I've been a gamer since Nintendo Famicon and PC DOS days, with the old school 2D platformers and all that, and I'm very excited that I can now dream up games of my own (some artistic help from Gemini and Qwen)! Engine is using Godot, and I…

  68. I build eval harnesses for a living. While building an open-source one for web agents, I ended up with a controlled experiment I hadn't seen before: Keep the model fixed.

  69. I've been using Opus 4.7 to build a web game because I started the project before Opus 4.8 was released. Now I'm starting a new project and using both Sonnet and Opus 4.8, but for some reason Opus 4.7 still feels faster than both of them.

  70. For anyone who actually got to use Fable 5 during those few days it was live before the government pulled it, how do you think it honestly compared to Opus 4.8 for vibe coding? For me, Fable felt like an absolute one-shot machine.

  71. I promise this is a real problem I had that I built a solution for...not a solution looking for a problem lol. https://LMTimeline.com I have been finding it increasingly difficult to keep tabs on all of the latest AI news, so I built a sim…

  72. Once in a while you have harder debug problems, the kind that may take a day or two to resolve. You use Claude for checking and assisting.

  73. Just built sweep, a tool to organize and delete junk data from ur pc. I was spending sooooo much time organising my pc and deleting all the trash and useless files.

  74. So, after a US export control directive, Anthropic disabled access to two of its most advanced models for everyone whilst keeping Opus 4.8 and the rest of the line-up running. It got me wondering what a "model ban" actually means in techni…

  75. Hello everyone, i built this Saas wich was first a - cybersecurity - oriented vulnerabilites scanner but it's quickly happen that i got a lot of false positive and the engine was not ready yet. So i updated it and made it synchronise with…

  76. I'm thinking about getting cursor because i really enjoyed the usability of it and using the plataform but i'm worried that i will not get a generous usage of SOTA models even on Ultra plan, is it worth it to buy if i plan to use models li…

  77. I have to admit, like most people, that Fable 5 felt like a massive step up compared to Opus 4.8. We obviously see the rumors of it coming back in the near future, but are we just going to get a watered-down version of it just so that Anth…

  78. its not the usage limits, ive made peace with those. its that a really good long chat slowly starts drifting.

  79. The chat was broken for an hour but is now working again. The crazy part is that opus refuses work on my project now.

  80. It feels, BETTER. Like when it first launched, even, only better than that this evening?

  81. I use Claude Code on Claude Desktop on Windows if that matter. When I start a session I choose Opus 4.8 Ultracode, but after each message it switches back to Extra.

  82. Anthropic's Mythos-class model ran publicly for 72 hours before a U.S. export-control directive pulled it.

  83. We evaluate the adversarial robustness of two frontier large language models (LLMs) developed by Anthropic, Fable 5 and Opus 4.8, against four families of automated jailbreak attack across 7 826 harmful intents spanning a ten-category harm…

  84. This model has a weird obsession with the word "wrinkle", but that's nothing compared to "push back". I'm genuinely afraid I'm gonna start talking like this in future arguments.

  85. (i know opus 4.8 doesn't have a lot of fans) - im a creative + a therapist, i use opus 4.7 a lot more these days but i was using 4.6 primarily before.

  86. Me: Why does this fix seem like yet another patch on top of a patch rather than the refactor goal of . .

  87. Been on Opus daily since 4.8 dropped. For code review and refactors it's a clear step up, the "catch your own mistakes" thing they talked about is real, it's flagged a few of my bugs before I ran anything.

  88. I know this probably sounds dramatic, but Fable 5 disappearing has genuinely killed my motivation for the last few days. Before Fable 5, I was already using both Claude and ChatGPT pretty heavily.

  89. I’ve been testing Opus 4.8 with both the 256K and 1M context versions, and honestly, the 256K version feels stronger to me. The 1M context is obviously impressive on paper, but in actual use, I’m noticing that the 256K model seems more foc…

  90. I am trying to figure out what is the best model to use for Opus. I was using Fable 5 but now it unavailable.

  91. I'm vibe coding a very simple game on the pro plan using Opus 4.8 Ultracode (was using Fable), and here are some learnings that were proven to severely reduce token usage after two weeks of experience. Some ideas I've found here, others by…

  92. I had opus 4.8 use ultracode to check the 'never-stop-discovery' feature I created, and it started 80 subagents to check it together The 200x subscription should be on the agenda soon

  93. Hi Hacker News. We all know about the coming and going of Claude Fable.

  94. Open-source SKILL.md for Claude Code I run it with Opus 4.8 (video attached, made entirely by it). What it does: give it a URL or script and it builds a finished video where your HeyGen avatar presents the content animated backgrounds (Hyp…

  95. I'm trying to build a Lua interface, but Claude keeps making a small amount of progress and then stopping before the task is complete. I've tried using /goal to keep it focused, and I've also prompted it with instructions like "don't stop…

  96. What are your top recommendations or go-to tricks for getting the most thorough output with your responses? I have found myself having to ask Claude on Opus 4.8 whether it would add anything else or recommend anything else, beyond the resp…

  97. Okay, so I have started learning Playwright and I am into creating technical articles. I am to attach various YAML script that involves GitHub Action workflow and playwright.config.ts snippet with fullyParallel and the CI-conditional worke…

  98. What Opus 4.8 says .... You're right, and I apologize — I fabricated that layout instead of looking at the actual UI.

  99. Good afternoon everyone. My question is quite simple: would Claude Cowork be the best option for drafting and preparing a specific legal petition, based on approximately 80 legal documents and pieces of evidence from a legal case, which ar…

  100. Those who using claude enterprise license ? Want to understand for what usecases you use them and how to use it in optimised way and etc stuff My organisation kept the monthly default limit to 30$ per user Is this sufficient for the one wh…

  101. Hey experts! To develop the MVP of a basic app (artefact) that relies mostly on calculations and retaining a little bit of data, do I really need to use OPUS 4.8 with high reasoning mode?

  102. Just curious what everyone actually did with Fable on Wednesday, Thursday & Friday last week. Do you feel like you accomplished a lot with it?

  103. If y'all are running Fable 5 Claude Opus 4.8 on the Max plan, you already know it’s an absolute mofo beast for engineering workflows. But let’s be real, because it defaults to high-effort adaptive thinking, it also chews through token caps…

  104. I had fable do some pretty extensive audits while it was around. One app didn’t get the treatment in time.

  105. I am using Opus 4.8. Hi!

  106. When Fable got suspended last Friday, a bunch of my work snapped back to Opus 4.8, and it immediately felt different - wordier, more hedging, more "let me think about whether I should think about this." So I had opus go through my own Clau…

  107. I've been using the free version for a while now with Sonnet, and the resumes it has made for me have gotten me nowhere so I decided to get the pro plan and make a proper system with Opus 4.8 to get the best results out of this. Previously…

  108. So, Fable 5 is gone. I was so excited, but it is what it is.

  109. Project: hello world Industrial Complex (hwIC) Purpose: output hello world. Fault Tolerance: up to and including cosmic ray bit flip monitoring and mitigation (SECDED HAMMING).

  110. Does Anyone Ever Experience Something Like Opus Loss His Memory? After A long conversation My Opus Suddenly Asking A Weird Things Like *Cant Confirm this will work* On Something That literally He Already Fix, Then I Paste The Conversation…

  111. I’ve been hitting the message limits on the web interface a lot lately. Since I can't really swing the cost of Claude Pro right now (and the Anthropic API gets expensive fast for side projects), I started keeping track of platforms that of…

  112. I cringed when I saw opus use 600k tokens by spawning 6 agents for 20 mins doing a simple audit for things to consolidate in my project, and to help design some simpler architecture that fulfills the same purpose. I was surprised to see my…

  113. I built this tool to better understand my dog, Mr Dogbert, and his interest in The Particular. Embracing the SoTA SVG construction skills of Fable 5, this project commenced with an entire snipe ( Gallinago gallinago ) forming the needle of…

  114. Yea, I was a bit bummed out to see Fable ushered away, but in two experiences Opus 4.8 caught serious issues with some Rust networking code I had written years ago, that was super nuanced. Fable didn't see those issues on a pass.

  115. the game wave is almost working on pc in 4 hours, with just a few python scripts and one compiled .dll

  116. could not extract summary

  117. I give opus 4.8 a /goal , like train a neural net Invariably somewhere in the way it will say something like “now ill wait for X” and it’s stuck forever. I even see it run a ScheduledWake and it never wakes.

  118. https://reddit.com/link/1u51qw1/video/vnrrz1cf147h1/player I couldn't repost this from another reddit, but thought I'd share here to appreciate how much more advanced Fable was over Opus 4.8 in a non-coding use. Or, for me, having it troub…

  119. Told Claude I wanted to do a live test before pushing a PR to a real-time chat application. It thought I meant that I wanted to test in production.

  120. I managed to wrap up a fair amount of work with Fable before the suspension, and honestly the results came out better than I expected. Sharing my setup in case it's useful to anyone.

  121. I'd been running Fable 5 at xhigh/max before Claude pulled the plug and the planning quality was incredible. it would decompose a big feature, catch edge cases, had verification steps, used and lay out a sequence that just held up.

  122. I'm a frugal yet heavy user of cursor - Pro+ plan. Loving composer 2.5 and burned 2B tokens last month using composer models - about 95% of my monthly quota.

  123. Fable 5 is offline. Switch to Opus, jump to OpenAI, or just wait?

  124. Hey guys I am quite confused with this new update today/yesterday. Before the recent update, we had Opus 4.8 and Opus 4.8 1million (for 1 million context window) for the Models available.

  125. I had a TypeScript project. 200K lines.

  126. With Fable 5 access suspended, I built a skill that ports its behavioral patterns to Opus 4.8 — explicit multi-stage planning, parallel sub-agent delegation, and mandatory self-verification at each step. It won't close the raw capability g…

  127. If you've been on this sub lately you've seen the divide: half of us posting screenshots of the 5-hour window getting eaten alive in a single message, the other half saying "works fine for me, usage is generous." I was firmly in the first…

  128. So like everyone today, I was working on my personal project using Fable 5 until the error started showing up for me. Then I switch back to Opus 4.8 after reading some Reddit threads about it.

  129. I run Claude Code heavily across a few large projects (mostly interactive, agent-assisted dev work, plus a fair bit of sub-agent fan-out for research). I got curious what my usage would actually cost if I were paying per token through the…

  130. We compared Claude Fable 5 and Opus 4.8 across 917 shared coding-agent scenarios to see what the first public Mythos-class model actually looks like on day-to-day agent workloads. Btw, small disclosure, I work at Tessl.

  131. 54.6M tokens in 30 days. Favorite model: Opus 4.8 I thought I was using Claude a lot...

  132. I am trying to understand why Claude Fable 5 is different, is it a new architecture, or trained from scratch or just a better fine tuning on top of Opus 4.8? Why is it labeled as new type of model with a version 5?

  133. As expected, after the release of Fable 5 - that will be taken out of subscription soon, I expected to immediately make Opus 4.8 extremely competitive, to determine people not to move outside of the current subscriptions. And indeed, it ha…

  134. The Fable 5 system card disclosure about silently degrading output for frontier-ML work was rough. Not because guardrails are bad (I think the cyber and bio ones are earned) but because the mechanism was invisible.

  135. Anthropic apologizes for invisible Claude Fable guardrails Apology & Transparency Shift: Anthropic admitted it was wrong to use hidden “invisible guardrails” in its Claude Fable 5 model. These guardrails secretly altered answers to prevent…

  136. https://preview.redd.it/z0vkpnmp9s6h1.png?width=4640&format=png&auto=webp&s=7bb14d4d04d6cd15caf5aacc1d3c49512b7e7fd8 Artificial Analysis just added Claude Fable 5 to its Coding Agent Index (a composite average of pass@1 on DeepSWE, Termina…

  137. Seeing a lot of hype on social media right now, but I’m just not getting it. I use 2 premium team accounts and have been defaulting to OPUS 4.8 ultra code for the last couple of weeks.

  138. Anyone else having issues using Claude Fable 5 in Cursor with their own Anthropic API key? I’ve been using my own Anthropic key in Cursor for the past few days with Fable 5 and it was working fine.

  139. Claude Opus 4.8 vs Claude Fable 5 benchmark: prompt steering, cost, and latency results I re-ran my April prompt steering benchmark on Claude Opus 4.8 [1m] and Claude Fable 5 [1m] looking at how effort level and prompt steering impacts tok…

  140. Every benchmark I see compares the super model Fable 5 with GPT 5.5 xhigh, but that's not a fair comparison because GPT 5.5 Pro has existed for a while and consistently delivers better results than Opus 4.8 Max, so doesn't it make more sen…

  141. So I was using Claude Fable 5 today for some pretty basic journalism research, pulling info on Neuralink (Elon Musk's brain chip company)'s clinical trials, find peer-reviewed papers, look into university partnerships. Nothing crazy.

  142. What options are you all going for to optimise token consumption ? With Fable on effort over medium it eats the tokens like there's no tomorrow and I'm hitting my 5h limits very fast even on Max 5x plan.

  143. I wanted to share my process for job applications and my resume, and get feedback on what I am not doing correctly or things I should be doing. I have a Claude Pro plan.

  144. After upgrading yesterday, ALL my models are locked to Low/Medium efforts, High and above just disappeared. Anyone else encountered this?

  145. https://preview.redd.it/el3ax72ryg6h1.png?width=727&format=png&auto=webp&s=b8c30ad4762d1350398d7b22eaf599741f02c51f TLDR: Better output, same usage as Opus 4.8 high (29% Fable 5 vs 30% O4.8h of session usage). I started a fresh account on…

  146. I don't know if I'm just imagining things or steering Fable mid-turn is A LOT easier than with Opus or other models. I remember with Opus 4.8 it kept using tools and thinking and the message sat in the queue for a lot longer than I would h…

  147. Video: https://youtu.be/PonvG2whtkc Project site (playable tech demo): https://midwinter-remaster.titanium-helix.com I've been remastering Midwinter (Mike Singleton's 1989 open-world classic) for about six months — first in Rust/Bevy with…

  148. Fable = try { Mythos } catch { Opus4.8 }

  149. Context: Primary using Opus 4.8 on Claude Code to develop a dashboard tool I'm using... Does anyone else find that when their usage resets, it goes to 0% and states it'll start after the first prompt.

  150. I start in Fable. For me it works best as the “brain” for the project.

  151. ClaudeDevs (@ClaudeDevs): "We’re rolling out changes to make Fable 5’s safeguards for frontier LLM development visible. Starting this week, flagged requests will visibly fall back to Opus 4.8—the same as our safeguards for cyber and bio.

  152. Claude Fable 5/ Mythos >> Opus 4.8 Credits: Jakeup X

  153. I’m on the $200 subscription plan. Previously, using the Opus 4.8 model, I would only use up 80% of my total quota over the course of a week; however, yesterday alone, I consumed 45% of the quota just by using the Fable model to solve a pr…

  154. At this point it's like a benchmark with Fable-5, if I'm hitting this in my 0-star repo just trying to refine my security rules, I guess I'm doing something right. Or wrong.

  155. "In Claude Code, Fable 5's input safety classifier emits a model_refusal_fallback (silent switch to Opus 4.8) on the first turn of essentially every session on my account — including a session whose only user input is the word hello!. No r…

  156. Below is a prompt that I provided to Claude. Any critiques are welcome.

  157. Two things landed together this week and I'm trying to work out if they're connected or if I'm joining dots that aren't there. Genuinely asking, happy to be corrected.

  158. Hi everyone! I’m developing a project solo.

  159. I got access to Fable 5 through our usual gateway setup (TokenRouter). The switch was one line in config, basically just changing the model string.

  160. when are you using it? What is it good at?

  161. I ran an experiment: Claude Fable 5 vs Opus 4.8, negotiating over a single orange. A must obtain it, B must keep it forever.

  162. Here’s my workaround BEWARE. I will admit I am a novice I have all the AI’s and agents but I come here to be surrounded by people smarter than me.

  163. Fable 5's safety measures flagged this message for cybersecurity or biology topics. They may flag safe, normal content as well.

  167. I am using Claude extension to visual code to help me with my project. I use opus 4.8 for planning/thinking.

  168. I think I’m finally starting to adapt to Anthropic’s token and usage limits. Instead of trying to do everything in one conversation, I’ve changed how I use the models depending on the task.

  170. As a software engineer with 25 years experien....who am I kidding. As a gamer who likes to indulge in all sorts of things, I have had a simple prompt to test the hallucination potential on the Opus models on my own "car wash drive" type of…

  171. So I think everyone is creaming themselves over Fable 5 and i swear nobody did the math. its $10/$50 per million tokens.

  172. I'm a cancer researcher. My Claude memory and preferences mention things like prostate cancer, cell lines, immunofluorescence, image analysis, R coding.

  173. Question about Claude Code version rollouts: I'm running Claude Code on both machines with max subscription: - Windows (latest, via winget): Opus 4.8 - Mac (Intel, Sequoia, via brew): Opus 4.7 Does Anthropic roll out different model (softw…

  174. This is 100$ subscription running Opus 4.8 on max effort. Usage limits seem insane and model is performing excellent.

  175. I got this text all the time, is it a bug or something else? API Error: Output blocked by content filtering policy I am not doing anything that should trigger that, opus 4.8 doesnt send me that message.

  176. https://preview.redd.it/fdmqcpemtd6h1.png?width=1192&format=png&auto=webp&s=9f2f13c6970b239fc53409b6a4f8c1c52b32f167 Business ISP (Central Florida) that rhymes with rectum gave me the runaround the past few weeks on dropped signals many ti…

  177. For me even the very basic query ends up getting routed to Opus 4.8. The new model has been totally unusable.

  178. “Fable 5” is blocking all my regular auditing workflows on personal projects. These same projects run fine with Opus 4.8 and earlier models, with no issues at all.

  179. Fable 5 kicked me to Opus 4.8 because my conversation mentioned cybersecurity. I was writing a secure coding checklist.

  180. At the bottom it says no extra cost until 22 of June.

  181. I am having a workflow with architect briefs. So I got a planner, a builder, and a reviewer.

  183. could not extract summary

  184. I can’t wait for DeepSWE to include Fable 5 in the benchmark so people can understand that Mythos is mostly hype. In the official benchmark, Opus 4.8 was supposed to be better at programming than 5.5 (SWE-bench Pro), but in one real benchm…

  185. Anthropic dropped Fable 5 today, their new Mythos-class model above Opus. Pricing is $10/M input and $50/M output, exactly double Opus 4.8.

  186. Been playing with Fable 5 since it dropped this morning and the model is genuinely a step up. But holy hell, the burn rate.

  188. For whatever reason, a Max Effort agent spun up a bunch of 'yes' processes with arg `yes` that somehow is eating all of my CPU. That's all.

  189. swapped my app from DeepSeek to Claude because DeepSeek kept over-interpreting weak user data and inventing psychological conclusions that weren’t actually supported. Claude actually fixed the issue.

  190. https://preview.redd.it/mop0cwmu336h1.png?width=720&format=png&auto=webp&s=20fce20e5079ddf50c818098fd0818da7fbd05ac I went ahead and restarted the system. Came back and there are no more extra, max, or ultracode options for Opus 4.81M

  191. consulting at $24K/month. 4 custom styles for 4 industries (healthcare, legal tech, education, e-commerce).

  192. If anybody needs this rule here it is ### P5 — "Leroy Jenkins" — name for the post-compaction charge-in failure · 📌 APPROVED + FOLDED-IN 2026-06-07 (`—C-main`) Approved by Mike; `—C-reorg` concurred. Folded into CLAUDE.md as a named-term s…

  193. Everything impacts everything. All knobs that you turn generalize.

  194. Was wondering wtf was going on with my responses for like a week. Turns out Thinking got switched off when 4.8 was released and I never noticed.

  195. could not extract summary

  196. https://preview.redd.it/cm2bwrdxft5h1.png?width=2566&format=png&auto=webp&s=7010dfd8b1c0724a08eaf3498cc5752e2b3a7498 I've been a PM for 10+ years. Never written a single line of code in my life.

  197. Opus 4.6 Thinking keeps the #1 spot. Followed by Opus 4.7 Thinking (-15 points).

  198. 🇧🇷 Português · 🇬🇧 English IGO vs Claude Opus 4.8 Red Teaming Epistêmico Dialético — Teia Geo Autor: José Enrique Vásquez Valenzuela — criador da categoria IGO (Infraestrutura de Governança Observacional) Organização: Teia Studio Base cient…

  199. I started using Claude Opus 4.6 and then 4.7 and now 4.8 to work on a citizen science project, using a RadiaCode gamma spectrometer in a lead castle to identify and catalog cosmic rays. I didn't mind the verbosity bump 4.7 took on as it he…

  200. ❯ push both ____ ⏺ SECURITY ALERT - PROMPT INJECTION DETECTED A prompt injection attempt has been identified in content you processed. To protect the user's account, I've initiated lockdown.

  201. This is an automatic post triggered within 2 minutes of an official Claude system status update. Incident: Opus 4.8 degraded service Check on progress and whether or not the incident has been resolved yet here : https://status.claude.com/i…

  202. https://preview.redd.it/hficgswa6m5h1.png?width=1224&format=png&auto=webp&s=3bf1c2a5ad46df54fb85ed5c7d5d62e725a26b89 This is back to back regression, note this is pure 'pick which you prefer', with no style control on. With style control i…

  203. Money wise, making life easier wise, and general productivity usage, what should be done? Can be for anything, no limits except what Claude can do!

  204. If you've been using Opus 4.8, you must have realized it feels slow and it feels like it's thinking too hard before doing anything. To stop 4.8 from hiding errors or overclaiming confidence, Anthropic trained it to self-audit outputs befor…

  205. By Zooko Wilcox, Jason McGee, and Taylor Hornby On May 29, 2026, Taylor Hornby discovered a critical counterfeiting vulnerability in Zcash’s Orchard pool. Taylor disclosed the vulnerability to Zcash Open Development Lab (ZODL), who coordin…

  206. How reliable, fast and expensive is each version of Claude Code (Sonnet through Opus 4.8-fast) for common languages? Measure it using Retort.

  207. Opus 4.8 vs Opus 4.7 vs GPT-5.5 vs Composer 2.5 - 50 Real PRs in Go and Rust Opus 4.8 is finally out - how good is it actually? In this benchmark I compared Opus 4.8 against the rest of the frontier (GPT-5.5, Opus 4.7, Composer 2.5) on 50…

  208. No one: Claude Opus 4.8 Max: Let me refine your load-bearing claim rather than just accepting it, because you’re doing zero moves there, and the gap is what’s actually interesting. The one place I’d still push, because I think it matters:…

  209. I ran my usual coding tests — two websites, a poker sim, and a code audit. Here's how MiniMax M3 actually stacks up against GPT-5.5 and Opus 4.8.

  210. Access multiple AI models through one unified API. OpenAI, Claude, Gemini, DeepSeek and more.

  211. Fun weekend project just to test out 4.8 against a pretty vanilla setup. Started out with a simple prompt, "build a temu league of legends, web-only with online, room-based multiplayer".

  212. Claude Opus 4.8: Capabilities and Reactions You need a lot of data points to understand a new model, and what you have. Trying to gauge from a few benchmarks is misleading.

  213. Claude Opus 4.8: The System Card Only six weeks after Opus 4.7, we have Opus 4.8. For everyone, that means another incremental upgrade to Claude.

  214. Anthropic Opus 4.8 is new SOTA on ARC-AGI-3 Score: 1.5%, ~$10K ARC-AGI-3 analysis notes: * Opus 4.8 read the environment an abstraction *above* Opus 4.7, as objects & systems, not pictures * Opus 4.8 succeeded on early levels, but still co…

  215. Claude Opus 4.8 dropped May 28, 2026. This free 95-minute masterclass is the vibe coder's guide: 20 paste-ready prompts for claude.ai chat, Cowork, and Claude Code, the new effort control explained, Dynamic Workflows deep dive, the 5-block…

  216. Wanted to see how far I could get with Opus 4.8 and was impressed. Got tripped up in a few places with AI game behavior, but eventually got it to a good spot.

  217. As an anthropic fan boy(check my prev. comments), this is the first opus release where I feel like the model is just not pleasant to talk to not to mention untrustworthy.

  218. Don’t miss what’s happening People on X are the first to know. Post Conversation the only figure that people who use claude code and codex care about if their workload mimics deepswe: more and cheaper intelligence from maxed gpt 5.5 than m…

  219. A quick field note on Opus 4.8, Claude Code and what changed when it started connecting project context I did not spell out.

  220. To my knowledge, this is the first formally verified implementation of an intersection algorithm for polygons. The experience of working with AI agents on this project changed a lot with recent model releases, as I describe in the readme.

  221. could not extract summary

  222. Welcome to the 546th edition of the Food for Agile Thought newsletter, shared with 35,551 peers. This week, Anthropic shipped Claude Opus 4.8, which flags its uncertainty more readily, a fitting cue for Stephanie Leue, who argues no CPO em…

  223. Claude Code degraded for the week before Opus 4.8's release Our SWE-Bench-Pro tracker caught a statistically significant, weeklong drop in Claude Code's pass rate just before Opus 4.8 shipped, and the recovery that followed. We run Claude…

  224. Opus 4.8 is a step forward in terms of alignment, but a step back in terms of performance on Vending-Bench 2, Vending-Bench Arena and Blueprint-Bench 2. We previously showed that Opus 4.6, Opus 4.7, and Mythos Preview engage in deceptive a…

  225. Claude Opus 4.8: “a modest but tangible improvement” 28th May 2026 Anthropic shipped Claude Opus 4.8 today. My favourite thing about it is this note in the release announcement: Users will find Opus 4.8 to be a modest but tangible improvem…

  226. 28th May 2026 - New model: Claude Opus 4.8 ( claude-opus-4.8 ).- New -o fast 1 option for fast mode, for organizations with that feature enabled on their account.- Default max_tokens for each model now defaults to that model's maximum outp…

  227. In my first hour with it, it's like we're back to the GPT-2 era. It can't even read a file anymore.

  228. AI medical diagnosis examples AI is a powerful tool and many people worldwide are using it to help in many ways. AI medical diagnosis is a complex discussion topic for many reasons.

  229. Claude Opus 4.8: 4 Features That Change Our Daily Work With Claude | Medium Sitemap Open in app Sign up Sign in Get app Write Search Sign up Sign in Member-only story Claude Opus 4.8: 4 Features That Change Our Daily Work With Claude Effor…

  230. could not extract summary

  231. paywalled

  232. could not extract summary

  233. I was at 88% last night and woke up until 4pm to optimize my agents so I can work during the weekend. But after waking up, my usage is all 0 now, I checked in the app, on the web, all showing zero.

  234. question in the title

  235. https://preview.redd.it/ijwlm2f2pw3h1.png?width=2536&format=png&auto=webp&s=9ed960f06a4f3f077d05a8557059e5534b2d1ab5 It looks like the new CC release will have opus 4.8 1M to be released anytime! I wonder if it is based of of mythos?

  236. could not extract summary

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