GitHub has made Anthropic’s Claude Fable 5.1 generally available in GitHub Copilot, giving eligible paid users a model intended for long-horizon coding and knowledge-work tasks. The rollout expands model selection across Copilot surfaces, while Business and Enterprise organizations must weigh and explicitly enable its data-retention policy.
GitHub said its internal testing found strong performance on substantial, long-running work including deep codebase research, feature development and complex agentic workflows. The model is billed at provider list pricing through Copilot’s usage-based billing.
Claude Fable 5.1 is available to Copilot Pro+, Max, Business and Enterprise users through the model picker in tools including Visual Studio Code, Visual Studio, Copilot CLI, the Copilot coding agent, GitHub Copilot app, github.com, GitHub Mobile, JetBrains IDEs, Xcode and Eclipse. GitHub said availability will roll out gradually.
For Copilot Business and Enterprise, administrators must turn on the Claude Fable 5.1 policy in Copilot settings; it is off by default. When the model is used, Anthropic retains prompts and outputs to operate safety classifiers for harmful-use detection, though GitHub says that retained data is not used to train Anthropic’s models. Other Claude models in Copilot continue to operate under zero data retention except Fable 5 and Fable 5.1.
Eligible enterprise customers can use Fable 5.1 and Fable 5 through zero-data-retention endpoints until the end of the calendar year under a time-bound exemption. GitHub says continued use after that will require Anthropic’s Enterprise Frontier Safeguards; approval does not itself enable the models, so an administrator must still activate the relevant policies. Source: GitHub Changelog
Definition. Claude Fable 5.1 is an Anthropic model available through GitHub Copilot for eligible paid plans and supported Copilot tools.
| Topic | Claude Fable 5.1 details |
|---|---|
| Paid-plan availability | Copilot Pro+, Max, Business, and Enterprise users are eligible. |
| Business and Enterprise setting | Administrator activation is required; the policy is off by default. |
| Data retention | Prompts and outputs are retained to operate safety classifiers for harmful-use detection. |
| Training use | GitHub says retained data is not used to train Anthropic’s models. |
| Enterprise exemption | Eligible customers can use Fable 5.1 and Fable 5 through zero-data-retention endpoints until the end of the calendar year. |
Key takeaways
- Claude Fable 5.1 is available to Copilot Pro+, Max, Business, and Enterprise users.
- GitHub says availability across supported Copilot surfaces will roll out gradually.
- For Copilot Business and Enterprise, the Fable 5.1 policy is off by default and requires administrator activation.
- Anthropic retains prompts and outputs for harmful-use safety classifiers when the model is used, according to GitHub.
- GitHub says retained data is not used to train Anthropic’s models.
- Eligible enterprise customers have a time-bound zero-data-retention endpoint exemption through the end of the calendar year.
FAQ
Who can use Claude Fable 5.1 in GitHub Copilot?
GitHub lists Copilot Pro+, Max, Business, and Enterprise users as eligible.
Do Business and Enterprise administrators need to enable Claude Fable 5.1?
Yes. The relevant policy is off by default in Copilot settings and must be activated by an administrator.
How is data handled when Claude Fable 5.1 is used?
GitHub says Anthropic retains prompts and outputs to operate harmful-use safety classifiers, and that retained data is not used to train Anthropic’s models.
Where is Claude Fable 5.1 available in Copilot?
GitHub lists the model picker in tools including Visual Studio Code, Visual Studio, Copilot CLI, the coding agent, GitHub Copilot app, github.com, GitHub Mobile, JetBrains IDEs, Xcode, and Eclipse.
