Claude Fable 5 from Anthropic is now available in GitHub Copilot, the first model in Anthropic’s Mythos class, designed for long-horizon, autonomous coding and knowledge-work tasks. Unlike other Claude models…

Anthropic launches Mythos with Fable 5. Six capabilities for agents: 80.3% code reasoning, extended thinking, autonomy. Vision, science acceleration, enterprise pricing

Anthropic’s new AI model brings long-horizon autonomy, first-shot accuracy, and stronger code review to GitLab.