Anthropic ships Claude Fable 5.2 and Mythos 5.2, big coding gains, free on $20 plan until Nov 16
JeremyNguyenPhD · x · 2026-11-10
Anthropic announced Claude Fable 5.2 and Claude Mythos 5.2, positioned as collaborators for ambitious technical projects with gains in coding, reasoning, and vision.
Jeremy Nguyen added availability and benchmark details:
- Pricing: Fable 5.2 is usable on the $20 Claude plan only until Nov 16, after that it costs credits; Fable resets are banked.
- Benchmarks (official comparison table): Fable 5.2 hits 49.1% on FrontierCode 2.0 agentic coding (vs 32.4% for Fable 5.1 and 45.5% for Opus 5.5), 69.9% on FrontierSWE v2, 74.6% on Terminal-Bench-Science 0.1 (Mythos 5.2: 75.3%), 76.3% on CyScenarioBench cybersecurity, 89.3% on OSWorld 2.1 computer use, 74.2% on Humanity's Last Exam with tools, and 73.4% on chart recognition—leading GPT-6 Astra and Gemini 4 Carbon across nearly every category.
Related event: Anthropic Launches Claude Fable 5.2 and Mythos 5.2(83 posts)→
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