GPT-6.2-Astra Spotted in Gray Release as Claude Mythos 5.5 Leaks Briefly
量子位 · wechat · 2026-11-02
Two unreleased frontier models surfaced in early November. OpenAI's GPT-6.2-Astra appeared in some $500 Pro-tier users' model lists, with reports of 20%–100% of requests being routed to it; peloton-bicycle tests suggest GPT focuses on physics while Claude leans artistic. Meanwhile, "Claude Mythos 5.5" — reportedly a version covering biological research and cybersecurity — briefly showed up in Anthropic's website frontend code before removal, and a dubious "leaked weights" repo on Hugging Face has already drawn 5,000+ downloads.
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