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claude_blog · Jul 10, 2026 · news
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Working at the frontier: How Cognition trusts Claude Fable 5 to work through the night | Claude by Anthropic
the Claude blogJul 10, 2026
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In brief
Cognition tested Claude Fable 5 in Devin, its AI software engineer. It's the first model its team trusts to run unattended for eight hours and deliver production-ready code.