Anthropic and OpenAI reportedly test unreleased models called Fable 5.5 and GPT-6.2 Astra
Reports suggest Anthropic and OpenAI are testing unreleased AI models, but neither company has publicly confirmed the reported model names. Anthropic’s model is described as Fable 5.5 in some reports, while Decrypt says a Mythos 5.5 label appeared in Anthropic’s site code and users reported requests being routed to a stronger model [1] [2] [3].
OpenAI’s GPT-6.2 Astra identifier reportedly appeared in some Codex users’ usage statistics; one account showed it at 19.8% of call volume, primarily around October 31. OpenAI’s public API catalog, changelog and announcements have not confirmed the model or a release date [4].
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- 1Claude Fable 5.5, GPT 6.2 Astra Could Be Right Around the Corner, Leaks SuggestDecrypt• Nov 2, 2026
- 2Anthropic reportedly tests Fable 5.5 as OpenAI reportedly eyes GPT-6.2 AstraCrypto Briefing• Nov 2, 2026
- 3Leaks Hint at Anthropic’s Claude Fable 5.5 and OpenAI’s GPT-6.2 Astra ModelsTheCoinrise.com• Nov 3, 2026
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