Superseded by Composer 2.5 and no longer listed, so it matters only for comparing versions.
Kenning's take
What it does
Composer 2 was the first Composer model built on a continued pretraining run, then trained with reinforcement learning on long coding tasks that need hundreds of actions. Cursor reported big gains over Composer 1.5 on Terminal-Bench 2.0 and SWE-bench Multilingual. It has since been replaced by Composer 2.5, which uses the same base checkpoint, Moonshot's Kimi K2.5.
- Continued pretraining on an open-source base
- Long-horizon reinforcement learning
- Terminal-Bench 2.0 score 61.7 and SWE-bench Multilingual 73.7, per Cursor
- Standard and faster variants
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
- 19 March 2026
- 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
- API price
- At launch: $0.50 per million input, $2.50 per million output tokens; fast variant $1.50 / $7.50
FAQ
When was Composer 2 released?
Cursor released Composer 2 on 19 March 2026.
How much did Composer 2 cost?
At launch, $0.50 per million input tokens and $2.50 per million output tokens, with a faster variant at $1.50 and $7.50.
Is Composer 2 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
Cursor Composer 1
First in-house Cursor coding model, built for fast agent work and released with Cursor 2.0
Cursor Composer 1.5
Second Cursor coding model, a thinking model with more training and self-summarising for long tasks
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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