Composer 2
Composer 2 is worth evaluating for coding, rag, and agents when its provider route and context window match the workload.
Use it for
- Teams evaluating coding, rag, and agents
- Workloads that can use a 200k context window
- Buyers comparing 1 tracked provider route
Do not use it for
- Vision or document-understanding workloads
- Family
- Composer
- Released
- 2026-03-19
- Context
- 200k
- Specialization
- code
- Openness
- Proprietary
- Weights
- Not released
- Code
- Unknown
Cheapest of 1 route · Cursor
About
Cursor's coding model released March 19, 2026. Fine-tuned from Moonshot AI's Kimi K2.5 checkpoint via continued pretraining and large-scale RL on long-horizon coding tasks. Scores 61.3 on CursorBench, 61.7 on Terminal-Bench 2.0 (vs. Claude Opus 4.6's 58.0), and 73.7 on SWE-bench Multilingual. Technical report: arxiv.org/abs/2603.24477. Available on all Cursor plans. Standard: $0.50/M input, $2.50/M output; Fast: $1.50/M input, $7.50/M output.
Composer 2 is a proprietary model in the Composer family. The structured metadata tracks a 200k-token context window, function calling, tool use, and code execution. This page tracks provider routes through Cursor, with the cheapest tracked route listed at $0.5 input and $2.5 output per 1M tokens. Headline tracked benchmarks include SWE-rebench 58.0, Terminal-Bench 2.0 61.7, and CursorBench 52.2.
Top use-case fit: coding, agents, and build tasks
Coding
Included by capability and metadata signals in the decision map.
RAG
Included by capability and metadata signals in the decision map.
Agents
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| Cursor | $0.500 | $2.50 |
Capabilities
Benchmark peer barsfor Coding
No task-mapped benchmark peers are available for this model yet.
Benchmark scores(3)
| Benchmark | Score | Version | Source |
|---|---|---|---|
| SWE-rebench | 58.0 | pass@1 (best of 5 runs) | https://swe-rebench.com/leaderboard |
| Terminal-Bench 2.0 | 61.7 | Official Harbor evaluation framework (score) | https://cursor.com/blog/composer-2 |
| CursorBench | 52.2 | CursorBench 3.1 | https://cursor.com/evals |
Migration checks
No linked migration route is available for this model yet.
Compare Composer 2 with other models
Frequently asked questions
What is the context window of Composer 2?
Composer 2 has a context window of 200k tokens.
How much does Composer 2 cost?
Composer 2 is available at $0.5/1M input tokens through Cursor.
When was Composer 2 released?
Composer 2 was released on 2026-03-19.
Which providers offer Composer 2?
Composer 2 is available from 1 provider: Cursor.
What benchmarks has Composer 2 been tested on?
Composer 2 has been evaluated on 3 benchmarks, including SWE-rebench, Terminal-Bench 2.0, CursorBench.
Cheapest of 1 route · Cursor