GitHub brings GPT-6.1 Terra to Copilot, including its Pro plan

GitHub made OpenAI’s GPT-6.1 Terra generally available in Copilot on October 26, 2026, bringing another model choice to developers on five paid plans, including Copilot Pro. The rollout is gradual, so eligibility does not guarantee immediate access. GitHub pitches Terra for everyday coding and terminal work at a lower cost than GPT-6.1 Sol.

A model for well-scoped coding jobs

GitHub describes Terra as designed for agentic coding—work carried out by an AI coding agent—and terminal tasks. It says the model works in focused, consolidated steps on well-scoped assignments. That positioning emphasizes contained jobs rather than a claim that Terra is the right choice for every coding project.

In early testing, GitHub says Terra solved noticeably more terminal and C# coding tasks than GPT-5.6 Terra. The announcement gives no numerical result or test methodology for that comparison. It is a qualitative claim from GitHub’s testing, not a quantified measure of improvement across coding work.

The performance and cost comparisons also use different reference points: GitHub compares task completion with GPT-5.6 Terra, while its lower-cost positioning is relative to GPT-6.1 Sol. It does not claim that Terra matches Sol’s coding performance.

Where Terra appears—and who controls access

Eligible plans are Copilot Pro, Pro+, Max, Business and Enterprise. As the rollout reaches an account, users can choose Terra through the model picker. GitHub lists access across desktop development tools, command-line and cloud-agent workflows, the web and mobile:

• Development environments: Visual Studio Code, Visual Studio, JetBrains IDEs, Xcode and Eclipse.
• Copilot tools: Copilot CLI, GitHub Copilot cloud agent and GitHub Copilot app.
• Web and mobile: github.com and GitHub Mobile on iOS and Android.

For company accounts, plan eligibility is only part of the access decision. Copilot Business and Enterprise administrators can manage Terra through the model policy in Copilot settings. Under default model enablement, new models are automatically enabled unless an administrator has turned off the global default or explicitly disabled Terra.