GitHub announced on September 29, 2026, that OpenAI’s GPT-6.1 Sol is generally available and rolling out in GitHub Copilot. GitHub positions it for agentic coding and terminal workflows, emphasizing multistep coding performance and efficient token use rather than merely adding another choice to a chat interface.
GitHub says early testing showed GPT-6.1 Sol completing tasks with noticeably fewer tokens and steps than earlier models in the GPT-6 and GPT-5.6 families. That is GitHub’s description of early testing, not a guarantee across repositories, languages, test suites, or tool permissions. A faster agent may also be decomposing work differently, so teams still need to inspect the changes and test results.
GPT-6.1 Sol is available to Copilot Pro+, Max, Business, and Enterprise users through the model picker in Visual Studio Code, Visual Studio, Copilot CLI, Copilot coding agent, the Copilot app, github.com, GitHub Mobile, JetBrains, Xcode, and Eclipse. GitHub notes that rollout is gradual, so an eligible account may not see the model immediately.
The model is billed at provider list pricing under usage-based billing. Fewer tokens do not automatically mean a lower total cost for a coding agent: a task may touch more files, run longer, use more tool calls, or select a higher effort setting for a more stable result. Teams should measure tokens, steps, tool calls, wall time, retries, rollbacks, and human review together.
Business and Enterprise administrators can manage access through the model policy in Copilot settings. With default model enablement on, new models are enabled automatically; administrators who turn off the global default or explicitly disable GPT-6.1 Sol can prevent access. Model governance and cost management therefore become part of the agent deployment decision rather than an individual preference.
A safer adoption path is to start with low-risk repositories and well-tested terminal tasks, record completion, test failures, rollbacks, and permission requests, and then decide whether to expand to long-running coding agents or production code. General availability means the model is in GitHub’s supported product supply; it does not remove a team’s code review, secret protection, or deployment gates.
