GitHub ChangelogTuesday · June 9, 2026FREE

Claude Fable 5 is generally available for GitHub Copilot

GitHub has announced the general availability of Claude Fable 5 for GitHub Copilot, integrating Anthropic's newest large language model into the coding assistant. Fable 5, which succeeds Claude Fable 4, is now accessible to all Copilot subscribers as a model option for both code completion and chat features. The model brings enhanced capabilities in reasoning, code generation, and understanding complex instructions, which can improve the quality of suggestions for intricate programming tasks. This move diversifies the AI models powering Copilot, which previously relied primarily on OpenAI's GPT-4 and GPT-4o. Developers can switch to Fable 5 in their Copilot settings to leverage its strengths, such as better handling of multi-step logic and nuanced code requirements. The integration is seamless, requiring no additional setup beyond selecting the model. GitHub emphasizes that Fable 5 has been fine-tuned for code-related tasks, aiming to reduce errors and increase productivity. This release marks a significant step in making Copilot a multi-model platform, giving developers more flexibility to choose the AI that best fits their workflow.