Source: GitHub Changelog — 2026-07-09
Summary
GitHub Copilot's model picker now includes OpenAI's three GPT-5.6 variants: Sol (highest reasoning ceiling, aimed at large-codebase and long-running agentic work), Terra (balanced default), and Luna (lightweight, cost-efficient). All three bill at provider list pricing under usage-based billing.
Key Takeaways
- Sol is gated to Copilot Pro+, Max, Business, and Enterprise SKUs — not available on lower tiers.
- Distinct from OpenAI's own GPT-5.6 launch (Sol/Terra/Luna) — this is specifically the GitHub Copilot IDE-integration rollout.
- Rollout is staged gradually across accounts rather than available to everyone immediately.
- Extends Copilot's growing multi-vendor model roster alongside its existing Anthropic and Google options.