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OpenAI’s GPT-5.6 Sol, Terra, and Luna are now available in GitHub Copilot

UpdateVerifiedAdded Sep 22, 2026

OpenAI’s GPT-5.6 family is now rolling out in GitHub Copilot. GPT-5.6 comes in three variants, Sol, Terra, and Luna, so you can match the model to the job, whether that’s reasoning over a large codebase, everyday agentic coding, or fast, cost-efficient assistance. GPT-5.6 Sol: The highest reasoning ceiling in the family.

Read GitHub's release notes

https://github.blog/changelog/2026-07-09-openais-gpt-5-6-sol-terra-and-luna-are-now-available-in-github-copilot

Summaries of vendors' own notes. Product names and logos belong to their owners; logos via logo.dev.

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