GitHub @github · 01 Sep 2026
Claude Fable 5.1, the latest in @AnthropicAI's Mythos model class, is now generally available in GitHub Copilot. In our testing it showed strong performance on ➡️ long-running coding tasks ➡️ deep codebase research ➡️ complex agentic workflows Try it out in the GitHub Copilot https://t.co/S2hekc8HZR
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