Coding Tools
OpenAI expands GPT-6 family with Sol and Luna for Copilot
GitHub Changeloghigh confidence
Why it matters
- →Developers can now optimize costs by routing simple tasks to the cheaper Luna model.
- →Agentic coding workflows gain a dedicated model (Sol) tuned for multistep validation.
- →GitHub Copilot shifts from a single-model experience to a multi-tiered selection strategy.
OpenAI has added two new models, GPT-6 Sol and GPT-6 Luna, to the GitHub Copilot ecosystem. GPT-6 Sol is designed for interactive and agentic coding tasks requiring careful validation, available on Pro+, Max, Business, and Enterprise plans. GPT-6 Luna serves as a lightweight, cost-efficient option for smaller tasks, accessible to all Copilot subscribers including the standard Pro tier. These models join the previously released GPT-6 Astra, allowing users to select the best fit for their needs via the model picker in supported IDEs such as VS Code, Visual Studio, and JetBrains. Administrators can manage access through Copilot settings, with new models enabled by default unless disabled.
Read originalThe story around this
Earlier coverage that leads up to this article, and what followed. Lines connect each piece to the closest one after it, converging here.
How we got here
- 1OpenAI Previews GPT-5.6 Sol Model
OpenAI · June 26, 2026 · Same story
- 2OpenAI launches GPT-5.6 amid regulatory scrutiny
The Verge AI · June 26, 2026 · Same story
- 3OpenAI's GPT-5.6 Models Now in GitHub Copilot
GitHub Changelog · July 9, 2026 · Same story
- 4OpenAI unveils GPT-5.6 model family
TechCrunch AI · July 9, 2026 · Same story
- 5OpenAI Unveils GPT-5.6 with Sol Model
Fireship · July 10, 2026 · Same story
- 6OpenAI Cuts Costs for GPT-5.6 Models
The Rundown AI · July 31, 2026 · Same story
- 7OpenAI Cuts Costs for GPT-5.6 Models
The Rundown AI · July 31, 2026 · Same story
- 8OpenAI Enhances ChatGPT with GPT-5.6 Sol
OpenAI · August 6, 2026 · Same story
What happened next
- 9GPT-6.1 Sol arrives in GitHub Copilot
GitHub Changelog · September 29, 2026 · Same story
- 10OpenAI releases GPT-6.1 Sol, cuts costs while boosting safety
TechCrunch AI · September 29, 2026 · Same story
- 11ChatGPT adds interactive UI elements with GPT-6
The Verge AI · October 7, 2026 · Related
- 12OpenAI Releases GPT-6.1 Terra for Computer Use
Duncan Rogoff · October 26, 2026 · Related
Follow this story
Open the full story →OpenAI expands GPT-6 family with Sol and Luna for Copilot
5 developments
- Sep 22 · GitHub Changelog
OpenAI expands GPT-6 family with Sol and Luna for Copilot (This article) - Sep 22 · TechCrunch AI
OpenAI releases GPT-6 Sol and Luna with lower costs↳ GPT-6 Sol and Luna API costs are halved compared to 5.6 series, with Sol errors reduced by half. - Sep 23 · The Rundown AI
Anthropic and OpenAI duel on price and performance↳ Anthropic’s Opus 5.5 tops the Intelligence Index while cutting costs by 40%. - Sep 23 · Matthew Berman
OpenAI Launches GPT-6 Sol and Luna - Sep 26 · Matt Wolfe
OpenAI Launches GPT-6 Sol and Luna Models
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