Anthropic launches Claude Fable 5.2 and Mythos 5.2: 30% faster, tiered access
sven_ai · x · 2026-11-10
- Anthropic released Claude Fable 5.2 and Mythos 5.2, claiming up to 30% faster output vs 5.1 and new API pricing of $8 input / $40 output per million tokens.
- Both share the same underlying model, differing only in safety restrictions and access: Fable is open, Mythos requires vetting.
- Benchmark chart shows Mythos 5/Fable 5 leading GPT 5.5 and Gemini 3.1 Pro on SWE-Bench Pro (80.3%), GDPval-AA (1932), Blueprint-Bench 2 (38.6%), AutomationBench (17.4%), etc. Top models may increasingly be tiered by task and risk.
Related event: Anthropic Releases Claude Fable 5.2 and Mythos 5.2(77 posts)→
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