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Claude Fable 5.1 vs. Fable 5: On real work, I couldn’t tell them apart.

calendar_today September 5, 2026 person Jessica Wachtel domain the-new-stack

Anthropic launched Claude Fable 5.1 this week, calling it “our most advanced model for coding and knowledge work.” There was The post Claude Fable 5.1 vs. Fable 5: On real work, I couldn’t tell them apart. appeared first on The New Stack .

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