GitHub Copilot adds Claude Fable 5 for autonomous coding
GitHub Copilot is now generally available with Anthropic's Claude Fable 5 model, designed for long-horizon, autonomous coding and knowledge-work tasks. This model offers improved efficiency over previous Opus-tier models by completing equivalent work with fewer tool calls and lower token consumption. It is available to Copilot Pro+, Max, Business, and Enterprise users and requires data retention for Anthropic's safety classifiers, a change from the Zero Data Retention of other Claude models.
- →Claude Fable 5 model available in GitHub Copilot
- →Claude Fable 5 shows improved performance in autonomous coding
- →Claude Fable 5 requires data retention for safety classifiers
- →Availability and selection of Claude Fable 5
- →Copilot Business and Enterprise administrators must enable Claude Fable 5
Features (1) ›
- Claude Fable 5 model available in GitHub Copilot
GitHub Copilot now includes Claude Fable 5 from Anthropic, an AI model designed for autonomous coding and knowledge-work tasks. This model is part of Anthropic's Mythos class and aims for improved efficiency in complex workflows.
Enhancements (1) ›
- Claude Fable 5 shows improved performance in autonomous coding
Internal benchmarks indicate that Claude Fable 5 can complete autonomous coding workflows with fewer tool calls and lower token consumption compared to previous Opus-tier models.
Notes (4) ›
- Claude Fable 5 requires data retention for safety classifiers
Unlike other Claude models in GitHub Copilot, Claude Fable 5 requires data retention for up to 30 days to operate Anthropic's safety classifiers. This retained data is not used for model training and is deleted after the retention period.
- Availability and selection of Claude Fable 5
Claude Fable 5 will be accessible to Copilot Pro+, Max, Business, and Enterprise users and can be selected via the model picker in various integrated development environments and GitHub platforms. A gradual rollout is in progress.
- Copilot Business and Enterprise administrators must enable Claude Fable 5
Administrators for Copilot Enterprise and Business plans need to manually enable the Claude Fable 5 policy in Copilot settings, as it is off by default. Enabling this policy signifies acknowledgement of the data retention requirement.
- Pricing and further information
Claude Fable 5 is billed at provider list pricing under Usage Based Billing. Users can consult GitHub Copilot’s pricing documentation for model and request costs, and refer to Anthropic's terms and data retention policy for details on data handling.
https://github.blog/changelog/2026-06-09-claude-fable-5-is-generally-available-for-github-copilot