Answer · Coding
What AI models does GitHub Copilot use?
GitHub Copilot runs on Claude 3.5 Sonnet (Anthropic), Claude 5 (Anthropic), Claude Fable 5 (Anthropic), Claude Fable 5.1 (Anthropic), Claude Haiku 4.5 (Anthropic), Claude Opus 4.5 (Anthropic), Claude Opus 4.6 (Anthropic), Claude Opus 4.7 (Anthropic), Claude Opus 4.8 (Anthropic), Claude Opus 5 (Anthropic), Claude Sonnet 4 (Anthropic), Claude Sonnet 4.5 (Anthropic), Claude Sonnet 4.6 (Anthropic), Claude Sonnet 5 (Anthropic), Gemini 3 Pro (Google), Gemini 3.6 Flash (Google), Gemini 3.7 Flash (Google), Gemini 3.8 Flash (Google), GPT-5 mini (OpenAI), GPT-5.2 (OpenAI), GPT-5.4 (OpenAI), GPT-5.6 Luna (OpenAI), GPT-5.6 Sol (OpenAI), GPT-5.6 Terra (OpenAI), GPT-6 Astra (OpenAI), Grok 4.5 (xAI), Grok 4.5 Raptor mini (xAI), Grok 4.6 (xAI), Kimi K2.7 Code (Kimi), Kimi K3 (Moonshot AI) and MAI-Code-1.1-Flash (GitHub), and routes requests between them.
- Models used
- 31
- Primary model
- Claude 5
- Public API
- Yes
- Last checked
- 2026-09-12
Model claims are labelled by how we know them: Claude 3.5 Sonnet — inferred, Claude 5 — disclosed, Claude Fable 5 — disclosed, Claude Fable 5.1 — disclosed, Claude Haiku 4.5 — disclosed, Claude Opus 4.5 — disclosed, Claude Opus 4.6 — disclosed, Claude Opus 4.7 — disclosed, Claude Opus 4.8 — disclosed, Claude Opus 5 — disclosed, Claude Sonnet 4 — disclosed, Claude Sonnet 4.5 — disclosed, Claude Sonnet 4.6 — disclosed, Claude Sonnet 5 — disclosed, Gemini 3 Pro — disclosed, Gemini 3.6 Flash — disclosed, Gemini 3.7 Flash — disclosed, Gemini 3.8 Flash — disclosed, GPT-5 mini — disclosed, GPT-5.2 — disclosed, GPT-5.4 — disclosed, GPT-5.6 Luna — disclosed, GPT-5.6 Sol — disclosed, GPT-5.6 Terra — disclosed, GPT-6 Astra — disclosed, Grok 4.5 — disclosed, Grok 4.5 Raptor mini — disclosed, Grok 4.6 — disclosed, Kimi K2.7 Code — disclosed, Kimi K3 — disclosed and MAI-Code-1.1-Flash — disclosed. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: Varies by model.
Other stack signals: OpenTelemetry, VS Code, JetBrains, Xcode, Neovim, Eclipse, Raycast and Zed.
Cite this answer
Tomorrow. “What AI models does GitHub Copilot use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-09-12. https://tomorrow.aliensquad.ai/q/what-models-does-github-copilot-use
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