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[ARTICLE · art-118198] src=machinebrief.com ↗ pub= topic=artificial-intelligence verified=true sentiment=↑ positive

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

Anthropic launched Claude Fable 5.1 and Mythos 5.1, its most capable AI models, with Fable 5.1 doubling its predecessor's score on Terminal-Bench-Science and improving agentic coding by over 30 percent while cutting costs by up to 45 percent for long, autonomous runs with many tool calls.

read1 min views1 publishedSep 1, 2026
Anthropic's Claude Fable 5.1 promises better coding and research at up to 45 percent less
Image: Machinebrief (auto-discovered)

By Matthias BastianSource:

The Decoder 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 The Decoder.

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