GPT 5

1. Ask HN: Any OSS models as good as GPT-4o-mini? (news.ycombinator.com)

   +2 12w

   Exactly what the title says. I've recently realized I rarely need something as powerful as GPT5 (or as expensive!).

2. Show HN: Vynex API – One endpoint for 34 LLM models, paid with USDT (llm-api.vynexcloud.com via hn)

   +2 12w gpt-5openai

   Vynex API is a unified LLM gateway that exposes a single OpenAI-compatible endpoint (https://llm-api.vynexcloud.com/v1). Developers keep their existing OpenAI SDK, set the base_url to https://llm-api.vynexcloud.com/v1, and call GPT-5.x, Cl…

3. Windows-Copilot-API; Access GPT-4 and GPT-5 models without API keys or billing (github.com via hn)

   +6 12w gpt-4gpt-5copilot

   Windows Copilot API: a free LLM API powered by Microsoft Copilot Using your own Microsoft Copilot account. No API key, no credits, no paid plan: it turns the free chat at copilot.microsoft.com into an API you can call from code.

4. How GPT-5 helped immunologist Derya Unutmaz solve a 3-year-old mystery (openai.com)

   12w gpt-5

   Doctor and immunologist Derya Unutmaz has been interested in artificial intelligence for years. But his “aha” moment came in late 2025, when GPT‑5 Pro helped him and his lab revisit a three-year-old puzzle centered on a special type of imm…

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