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model roundup

Mythos 5

32 items · started 2026-06-06 · closed 2026-06-18

  1. As the rest of the country celebrated the USA’s first World Cup win and the New York Knicks championship, Anthropic spent its weekend fighting the Trump administration over its latest model release. At 5:21 PM on Friday, the company receiv…

  2. I’m a Senior Software Engineer, and right now, I feel completely lost in limbo. I was a long-time Opus user.

  3. The Jailbreak that Got Fable 5 Pulled Exists in Every Model On Friday, June 12, 2026, at 5:21pm ET, Anthropic received an order from the US government. By that evening, Claude Fable 5 and Claude Mythos 5, the two most capable models the co…

  4. According to the Wall Street Journal, the export control directive that led to Anthropic cutting off access to Fable 5 and Mythos 5 was triggered in part by cybersecurity research from Amazon and conversations between CEO Andy Jassy and th…

  5. US orders Anthropic to disable AI models for all foreign nationals The company said it received an export control directive to suspend access to Fable 5 and Mythos 5 for foreign nationals. The AI firm Anthropic has blocked access to its ne…

  6. Catenaa, Saturday, June 13, 2026- Anthropic said it is disabling all customer access to its Fable 5 and Mythos 5 AI models to comply with a Trump administration directive. “The US government, citing national security authorities, has issue…

  7. Following the news that the US government issued an export control directive ordering Anthropic to suspend access to Fable 5 and Mythos 5 for all foreign nationals, I ran an experiment. I put the same sequence of prompts to four frontier A…

  8. This post covers the Fable 5/Mythos 5 suspension as a product and policy event affecting Claude users. It is not intended as political commentary.

  9. Question in the title, I find it odd that Fable 5 and Mythos 5 are being gatekept and effectively banned from wide access across users because "they could be dangerous". ​ Would this mean that any further improvement similar to Fable or My…

  10. The export control thing happened a few hours ago, and I couldn't stop thinking about it, so I made a song. I tried to keep it grounded in the actual facts: the model didn't fail any red-teaming, the reported "bypass" was basically reading…

  11. The Claude Fable 5/Mythos 5 System Card has a section in which they talk about illegible reasoning, and provide an "extreme" example thereof. Models developing their own uninterpretable, unmonitorable internal language has been a major the…

  12. So this dropped today. The US government sent Anthropic an export control order on national security grounds, and it's worded broadly enough that Anthropic says they've got no choice but to shut off Fable 5 and Mythos 5 for all of us to st…

  13. The US government has ordered Anthropic to suspend Fable 5 and Mythos 5 worldwide over cybersecurity concerns, For a crypto industry that spent last week debating whether these models would arm attackers or defenders, the answer just got m…

  14. Anthropic has abruptly disabled its newly launched Claude Fable 5 and Mythos 5 AI models for all customers to comply with an urgent export control directive from the U.S. government today.

  15. Anthropic completely shut off access to its Mythos 5 and Fable 5 models Friday night, just days after they were launched. The move comes after Anthropic’s receipt of a US Commerce Department directive Friday evening, subjecting the new mod…

  16. Anthropic on Friday announced it's disabled access to its Fable 5 and Mythos 5 artificial intelligence models to comply with an export control directive from the U.S. government that cited "national security authorities." The company said…

  17. NEW: Data: Design sync sync hashes module — Adds bundled hashing helpers that keep package builds, captures, preview rebuilds, remote diffs, sidecars, and grade carry-forward aligned on shared source, render, style, and grade hash recipes.…

  18. Usage share of OpenAI grew vs Anthropic yesterday despite Mythos 5 / Fable 5 launch Multiple power users at SemiAnalysis tried Mythos / Fable Got refusals for nonsensical reasons Got pissed off at Anthropic Gave Codex a legitimate try Now…

  19. In 1968 five countries that already had nuclear weapons signed a treaty declaring them too dangerous for anyone else to build. India refused, pointing out the treaty did not say nukes were too dangerous to exist, just too dangerous for new…

  20. Anthropic's powerful new models deliberately become less helpful when they detect users are working on AI research, according to technical disclosures that are already sparking controversy across the industry. In a system card for Mythos 5…

  21. Well, how do I start this, I think we first need some important context. Chai: https://preview.redd.it/egngyea5cf6h1.png?width=1080&format=png&auto=webp&s=9ade63fbc584b7fab28dba4914bc3fcb877f557f Hasbullah / Hasbi: https://preview.redd.it/…

  22. > For Fable 5, Mythos 5, and future models on Bedrock with similar or higher capability levels, Anthropic will require 30-day retention for all traffic on Mythos-class models. Retaining data for a limited period allows Anthropic to detect…

  23. From the Anthropic Claude Mythos 5/Fable 5 system card: https://www-cdn.anthropic.com/d00db56fa754a1b115b6dd7cb2e3c342ee809620.pdf

  24. From the Anthropic Claude Mythos 5/Fable 5 system card: https://www.anthropic.com/news/claude-fable-5-mythos-5

  25. The more I look at Fable 5 the more I think we're witnessing a shift that is much bigger than a single model release. For the last few years every frontier model has been competing on the same axis: intelligence.

  27. 10th June 2026 - Link Blog If Claude Fable stops helping you, you'll never know (via) Jonathon Ready highlights one of the more eyebrow-raising details from the 319 page system card for Fable 5 and Mythos 5. Here's a longer excerpt, highli…

  28. Claude Fable 5 and Mythos 5 Pricing: Anthropic's New $10/$50 Top Tier Anthropic launched Claude Fable 5 and limited-preview Claude Mythos 5 at $10 input and $50 output per million tokens, with 1M context and 128K max output. By AI Pricing…

  29. could not extract summary

  30. https://preview.redd.it/58fk4njjwv5h1.png?width=877&format=png&auto=webp&s=e5c28014b15f4901f3752422d61864c53cff25c4 https://x.com/pankajkumar_dev/status/2063625695285084419?s=20 - Mythos is extremely strong at SVG generation, producing hig…

  31. Release could be imminent, but what this tells us is they'll likely brand it as Claude 5.

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