Composer 2.5
Composer 2.5 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 1m context window
- Buyers comparing 1 tracked provider route
Do not use it for
- Vision or document-understanding workloads
- Family
- Composer
- Released
- 2026-05-18
- Context
- 1m
- Specialization
- code
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Not released
Cheapest of 1 route · Cursor
About
Cursor's agentic coding model released May 18, 2026. Built on Moonshot AI's Kimi K2.5 open-source checkpoint with targeted RL using textual feedback and 25× more synthetic training tasks than Composer 2. Designed for long-horizon software engineering tasks: multi-file edits, terminal command execution, codebase-wide semantic search, and autonomous task planning. Uses Cursor's compaction-in-the-loop context management for long coding sessions. Available on all Cursor plans; accessed through the Cursor IDE (not a standalone API). Standard pricing: $0.50/M input, $2.50/M output; Fast (default): $3.00/M input, $15.00/M output.
Composer 2.5 is a proprietary model in the Composer family. The structured metadata tracks a 1m-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 Terminal-Bench 2.0 69.3, SWE-bench Multilingual 79.8, and CursorBench 63.2.
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 | Serverless |
Capabilities
Benchmark peer barsfor Coding
No task-mapped benchmark peers are available for this model yet.
Benchmark scores(4)
| Benchmark | Score | Version | Source |
|---|---|---|---|
| Terminal-Bench 2.0 | 69.3 | Terminal-Bench 2.0 | https://www.buildfastwithai.com/blogs/cursor-composer-2-5-review-2026 |
| SWE-bench Multilingual | 79.8 | SWE-bench Multilingual | https://getaibook.com/news/cursor-composer-25-hits-798-on-swe-bench-multilingual/; https://www.buildfastwithai.com/blogs/cursor-composer-2-5-review-2026 |
| CursorBench | 63.2 | CursorBench 3.1 | https://cursor.com/evals |
| SWE-rebench | 79.8 | Reported as SWE-bench Multilingual (300 tasks, 9 languages) (resolved%) | https://cursor.com/blog/composer-2-5 |
Migration checks
No linked migration route is available for this model yet.
Compare Composer 2.5 with other models
Comparison and alternatives
Browse all comparisons →Show all 15 popular comparisonssorted by 7-day search impressions
Frequently asked questions
What is the context window of Composer 2.5?
Composer 2.5 has a context window of 1m tokens.
How much does Composer 2.5 cost?
Composer 2.5 is available at $0.50/1M input tokens through Cursor.
When was Composer 2.5 released?
Composer 2.5 was released on 2026-05-18.
Which providers offer Composer 2.5?
Composer 2.5 is available from 1 provider: Cursor.
What benchmarks has Composer 2.5 been tested on?
Composer 2.5 has been evaluated on 4 benchmarks, including Terminal-Bench 2.0, SWE-bench Multilingual, CursorBench, SWE-rebench.
Cheapest of 1 route · Cursor