Claude Opus 5.5 Arrives in GitHub Copilot for Pro+, Max, Business and Enterprise Plans
Anthropic's Claude Opus 5.5 joins GitHub Copilot's model picker on paid plans, billed at provider list pricing with a gradual rollout. Outputs carry a watermark.
- Published
- Reading time
- 1 min read
- Author
- VoltKit Editorial
Based on an official announcement · Source: GitHub changelog
What happened
GitHub announced on 22 September 2026 that Claude Opus 5.5, which it describes as Anthropic's newest Opus model, is available in GitHub Copilot. The changelog entry positions it for agentic coding, long-running agentic tasks and knowledge work.
What we know
- Availability: Copilot Pro+, Max, Business and Enterprise users can select the model. GitHub lists Visual Studio Code, Visual Studio, Copilot CLI, the Copilot coding agent, the GitHub Copilot app, github.com, GitHub Mobile on iOS and Android, JetBrains IDEs, Xcode and Eclipse as surfaces.
- The rollout is gradual; GitHub says to check back if the model is not visible yet.
- The model is billed at provider list pricing under usage-based billing.
- GitHub reports that in early testing Opus 5.5 "resolved tasks comparably to Claude Opus 5 while using significantly fewer steps and tokens", and recovered quickly from errors in multi-step tasks.
- Claude Opus 5.5 watermarks its text outputs. According to GitHub, the watermark does not change the meaning, quality or readability of outputs and adds no tokens or cost.
- Business and Enterprise administrators control access through the model policy in Copilot settings; under default model enablement, new models are enabled automatically unless an administrator has turned that off.
What is not yet confirmed
The performance comparison is GitHub's own early-testing statement and has not been independently verified. VoltKit could not retrieve Anthropic's own announcement of the model at the time of writing, so details such as context length and pricing are not covered here.
Why it matters
Model choice inside Copilot now spans several providers, and the billing note matters: usage-based pricing at provider list rates can differ substantially from the included models on each plan. The watermarking of outputs is also a first for a model in Copilot's picker and may be relevant to teams with policies on disclosing AI-generated text.
Sources
This summary was written from the documents below. Read the original before relying on any detail.
- Claude Opus 5.5 is now available in GitHub Copilot(opens in a new tab)
GitHub changelog · Official announcement · github.blog · published
VoltKit summarises and organises information from public and official sources; it does not have reporters on the ground. How stories are sourced and corrected.