Answer · Coding
What AI models does Cursor use?
Cursor runs on Claude 4 Sonnet (Anthropic), Claude 4.5 Haiku (Anthropic), Claude 4.5 Opus (Anthropic), Claude 4.5 Sonnet (Anthropic), Claude 4.6 Opus (Anthropic), Claude 4.6 Sonnet (Anthropic), Claude 4.7 Opus (Anthropic), Claude Fable 5 (Anthropic), Claude Fable 5.1 (Anthropic), Claude Opus 5 (Anthropic), Claude Sonnet 5 (Anthropic), Composer 2.5 (Provider undisclosed), Gemini 3.1 Pro (Google), Gemini 3.6 Flash (Google), Gemini 3.7 Flash (Google), Gemini 3.8 Flash (Google), GPT-5.6 Luna (OpenAI), GPT-5.6 Sol (OpenAI), GPT-5.6 Terra (OpenAI), Grok 4.5 (xAI) and Grok 4.6 (xAI), and routes requests between them.
- Models used
- 21
- Primary model
- Claude 4 Sonnet
- Public API
- Not published
- Last checked
- 2026-09-12
Model claims are labelled by how we know them: Claude 4 Sonnet — disclosed, Claude 4.5 Haiku — disclosed, Claude 4.5 Opus — disclosed, Claude 4.5 Sonnet — disclosed, Claude 4.6 Opus — disclosed, Claude 4.6 Sonnet — disclosed, Claude 4.7 Opus — disclosed, Claude Fable 5 — disclosed, Claude Fable 5.1 — disclosed, Claude Opus 5 — disclosed, Claude Sonnet 5 — disclosed, Composer 2.5 — disclosed, Gemini 3.1 Pro — disclosed, Gemini 3.6 Flash — disclosed, Gemini 3.7 Flash — disclosed, Gemini 3.8 Flash — disclosed, GPT-5.6 Luna — disclosed, GPT-5.6 Sol — disclosed, GPT-5.6 Terra — disclosed, Grok 4.5 — disclosed and Grok 4.6 — disclosed. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: 1000000.
Other stack signals: VS Code Agent and Coding Assistant.
Cite this answer
Tomorrow. “What AI models does Cursor use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-09-12. https://tomorrow.aliensquad.ai/q/what-models-does-cursor-use
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