Composer 2
Cursor Composer 2: continued pretraining plus long-horizon RL, 61.7 on Terminal-Bench 2.0, priced at $0.50/$2.50 per million tokens.
Cursor's second-generation in-house model, trained with continued pretraining then RL on tasks needing hundreds of actions. It was later disclosed to be built on Moonshot's Kimi K2.5 (licensed via Fireworks), which the launch post omitted.
- Date
- Thursday, 19 March 2026
- Lab
- Anysphere (Cursor)
- Kind
- model
- Access
- app only
- Price
- $0.50 / $2.50 per M tokens (input/output); fast $1.50 / $7.50
Figures
| Measure | Value | Measured by |
|---|---|---|
| Terminal-Bench 2.0 | 61.7 Composer 1.5: 47.9 | company |
| CursorBench | 61.3 Composer 1.5: 44.2; Cursor's own benchmark | company |
| SWE-bench Multilingual | 73.7 Composer 1.5: 65.9 | company |
Kimi K2.5 base revealed by a developer inspecting an API model ID; Cursor co-founder Aman Sanger called the omission 'a miss'; Moonshot said use was authorized. Blog post date 2026-03-19 per Cursor; some outlets say 03-18. Kimi attribution comes from secondary sources.
Sources
- cursor.com/blog/composer-2
- mlq.ai/news/cursor-confirms-moonshot-ais-kimi-k25-powers-composer-2-amid-partnership-revea
This record was checked against its sources on 6 October 2026. How we check