AI ResearchThe Decoder·September 1, 2026

Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less

Anthropic launches Claude Fable 5.1 and Mythos 5.1, its most capable AI models yet. Fable 5.1 doubles its predecessor's score on Terminal-Bench-Science and improves agentic coding by over 30 percent. Costs drop by up to 45 percent for long, autonomous runs with many tool calls. The article Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less appeared first on…

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