Claude Fable 5.1 is generally available in GitHub Copilot
Why CEREBRO kept it
Fable 5.1 integrated into Copilot
The text below is an automated extraction of the article at https://github.blog/changelog/2026-09-01-claude-fable-5-1-generally-available-in-github-copilot, stored verbatim in the public cerebro-vault repository. Copyright remains with the original publisher (github.blog).
<p>Claude Fable 5.1 from Anthropic is now available in GitHub Copilot. The latest model in Anthropic’s Mythos class, Claude Fable 5.1 is designed for long-horizon, autonomous coding and knowledge-work tasks.…</p> <p>The post <a href="https://github.blog/changelog/2026-09-01-claude-fable-5-1-generally-available-in-github-copilot">Claude Fable 5.1 is generally available in GitHub Copilot</a> appeared first on <a href="https://github.blog">The GitHub Blog</a>.</p>
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