Claude Mythos/Fable 5.5 leaks in Anthropic source; users invoke unreleased GPT-6.2 Astra
APPSO · wechat · 2026-11-02
APPSO rounds up early-November leaks from Anthropic and OpenAI:
- Anthropic: kimmonismus found unreleased "ClaudeMythos 5.5" in Anthropic's website HTML (later removed); LiteLLM's Azure pricing config briefly listed claude-fable-5-5, reportedly with 1M-token input, 128K output, at $10/$50 per million tokens.
- Fable 5.5 demos: developers posted claimed Fable 5.5 creations—one-prompt Minecraft-style game, dynamic 3D scenes beating Opus 5.5 in comparison, a zero-shot interactive sailing ship, and a recolorable sports car app—though none included prompts or logs, so authenticity is unverified.
- OpenAI: gpt-6.2-astra appeared in some Codex usage stats (19.8% share) and API responses; one user invoked it via Codex CLI showing a 1M-token window. Community verdicts split: some say coding rivals or beats Opus 5.5, others say it falls short.
The piece notes Google DeepMind shipped Gemini 4 Carbon on Oct 28 and that Qwen4/GLM-5.5 rumors point to a crowded November of flagship updates, warning that pre-launch hype is a double-edged sword for vendors.
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