Replaced by later Composer versions and no longer listed, so this is of historical interest only.
Kenning's take
What it does
Composer was Cursor's first own coding model, a mixture-of-experts model trained with reinforcement learning on real software tasks using tools such as code search, file editing and the terminal. Cursor said it generated code about four times faster than similarly capable models, finishing most turns in under 30 seconds. It launched with Cursor 2.0 and has since been replaced by later Composer versions.
- Mixture-of-experts model trained with reinforcement learning
- Trained with codebase-wide semantic search and terminal tools
- Most agent turns under 30 seconds
- About four times faster than similar models, by Cursor's measure
Who it suits. Developers using Cursor who want a fast in-house coding model for agent work.
Key facts
- Category
- AI models
- Part of
- Cursor
- Made by
- Anysphere, Inc. (Cursor)
- Released
- 29 October 2025
- How to get it
- Released inside Cursor; No longer listed in Cursor's models and pricing docs as of 2026-10-11; Composer 2.5 is the current version
- Works on
- Cursor (desktop, web, CLI, iOS)
- In the UK
- Yes
FAQ
When was Cursor Composer released?
Cursor released Composer on 29 October 2025 alongside Cursor 2.0.
Is Composer 1 still available?
It is no longer listed in Cursor's models and pricing docs. Composer 2.5 is the current version.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
Similar tools
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Cursor Composer 2
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Cursor Composer 2.5
Current Cursor in-house coding model, tuned for long agent sessions and more reliable behaviour
ACE-Step 1.5
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