GitHub announced the availability of Claude Opus 5.5 in GitHub Copilot on September 22, 2026. This model, described as Anthropic's newest Opus model, supports agentic coding, long-running agentic tasks, and knowledge work. Separately, AWS confirmed that Claude Opus 5.5 is also available on Amazon Bedrock and Claude Platform on AWS.
Key Points
- Claude Opus 5.5 is available in GitHub Copilot for Copilot Pro+, Max, Business, and Enterprise users.
- In early testing, Opus 5.5 resolved tasks comparably to Claude Opus 5 while using fewer steps and tokens.
- The model quickly recovered from errors during multistep tasks.
- Claude Opus 5.5 watermarks its text outputs without affecting meaning, quality, readability, token count, or cost.
- GitHub Copilot Enterprise and Business plan administrators can manage access to Claude Opus 5.5 via model policy in Copilot settings.
- The model is billed at provider list pricing under usage-based billing in GitHub Copilot.
Context
According to GitHub, the rollout of Claude Opus 5.5 will be gradual. New models are automatically enabled by default unless an administrator has turned off the global default or explicitly disabled the model. AWS states that Claude Opus 5.5 is Anthropic's most capable Opus model for agentic coding, knowledge work, and long-running tasks.
Why It Matters
Builders and organizations using GitHub Copilot or AWS services can now access Claude Opus 5.5 for enhanced agentic capabilities and efficiency in coding and knowledge work, potentially impacting development workflows and resource consumption.
What To Do
- Check GitHub Copilot's model picker to see if Claude Opus 5.5 is available in your account.
- Review the "Models and pricing for GitHub Copilot" documentation for billing details.
- Administrators should examine the model policy in Copilot settings to manage access for their teams.
- Explore the Amazon Bedrock and Claude Platform on AWS documentation for guidance on building with Claude Opus 5.5.