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Anthropic\'s Claude Fable 5.1 rated No.1, beating GPT and Grok

Anthropic has unveiled its new AI model, Claude Fable 5.1, which took the top two spots in an external language-model ranking shortly after launch, ahead of rival models from OpenAI, Google and others. In Artificial Analysis scores, Fable 5.1 variants scored 66 and 65, while Claude Opus 5 scored 63. Anthropic also reported higher performance on its benchmarks, kept token pricing, and cut cached-context reread costs. It also introduced Claude Mythos 5.1 with restricted access for high-risk fields.