GitHub Adds GPT-6 Sol and Luna to Copilot's Model Picker
The gradual rollout separates a balanced coding option from a lighter model, with plan eligibility and administrator controls differing between them.
Edited by Tyronne Panaino
GitHub began rolling out OpenAI's GPT-6 Sol and GPT-6 Luna across GitHub Copilot on September 22. The official GitHub changelog says the two models join the previously released GPT-6 Astra and are billed through Copilot's usage-based billing system. Availability is gradual, so eligible users may not see both options immediately.
The release expands model choice rather than replacing the existing GPT-6 option. GitHub positions Sol as a balanced model for interactive and agentic coding, especially work that benefits from careful multistep validation. It describes Luna as a lighter, cost-efficient choice for smaller and faster tasks and as the lowest-cost model in the GPT-6 family. Those are vendor product positions; the fetched evidence does not include independent coding evaluations, latency measurements or a price table.
Different roles inside the model picker
Sol and Luna are presented for different development workloads. Sol is the general-purpose option in this release, aimed at interactive coding and longer agent flows where several steps need checking. Luna is the smaller option for tasks where speed and lower usage cost matter more than the broader positioning attached to Sol.
The distinction gives developers a visible task-to-model choice inside Copilot, but it does not establish that one model will be better for a particular repository, language or workflow. GitHub supplies no benchmark results in the announcement. Teams comparing the options will need to measure completion quality, tool behavior, latency and consumed requests under their own settings.
Both models use usage-based billing. The release links to separate pricing documentation but does not state the request multipliers or monetary rates in the fetched page, so this article does not reproduce them. The supported conclusion is limited to the billing mode and GitHub's relative description of Luna as the family's lowest-cost option.
Plan access and product coverage
GPT-6 Sol is available to Copilot Pro+, Max, Business and Enterprise plans. GPT-6 Luna is available to Copilot Pro, Pro+, Max, Business and Enterprise plans. The lower entry tier for Luna makes the two rollout footprints different even before administrators apply their own model policies.
GitHub says both models can appear in the picker across Visual Studio Code, Visual Studio, Copilot CLI, the GitHub Copilot cloud agent, the Copilot app, github.com, GitHub Mobile on iOS and Android, JetBrains, Xcode and Eclipse. The page describes that product coverage as a gradual rollout rather than simultaneous availability for every user.
That rollout language is important for support teams. A missing model in an eligible client does not necessarily establish a configuration fault on the release date. Version requirements, regional differences and exact rollout completion are not specified in the fetched announcement, so those remain checkpoints rather than facts this article can settle.
Administrator controls
Copilot Business and Enterprise administrators can manage GPT-6 access through the model policy in Copilot settings. Under GitHub's default model-enablement behavior, new models are enabled automatically unless an administrator has disabled the global default or explicitly disabled the model.
This means model availability depends on more than the user's subscription. A supported client and eligible plan can still be affected by organizational policy, while the gradual rollout adds a separate timing variable. Organizations that govern model use should review their default-enablement setting before interpreting appearance in the picker as an intentional approval.
Evidence quality and limits
Internal confidence is medium because the article relies on one official GitHub release note. It confirms the rollout date, model names, GitHub's positioning, eligible plans, product surfaces, billing mode and administrator controls. It does not provide independent quality tests, latency data, exact usage rates, safety results or a completion date for the rollout.
Status
Confirmed. GitHub documents the gradual Copilot rollout of GPT-6 Sol and GPT-6 Luna; comparative performance and final rollout coverage remain unverified.
Sources
Update note: Last reviewed 2026-09-23. We will revise this post if GitHub changes plan eligibility, model-policy defaults, billing treatment or rollout coverage.
Sources
Drafted with AI assistance from source briefs; reviewed for citation completeness and label accuracy.