Anthropic's Claude Fable 5.1: better coding and research at up to 45% less cost
The Decoder · rss · 2026-09-02
Anthropic launched Claude Fable 5.1 and Mythos 5.1, its most capable models yet. Fable 5.1 doubles its predecessor's Terminal-Bench-Science score and improves agentic coding by over 30%, while costs drop by up to 45% for long autonomous runs with many tool calls.
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