specs at a glance
| Leaderboard rank | #18 of 21 |
|---|---|
| SWE-bench Verified | 79.6% |
| SWE-bench Pro | — |
| Terminal-Bench | — |
| Input price / 1M | $0.50 |
| Output price / 1M | $2.50 |
| Context window | 200k |
| Open weights | No |
| Access | Cursor IDE and Cursor CLI only; no external API, no third-party gateway |
| Maker | Cursor |
how good is Composer 2.5 at coding?
Composer 2.5 sits at #18 of 21 ranked models, posting 79.6% on SWE-bench Verified — 17.4 points behind #1 Claude Opus 5.
Score provenance: Independent (vals.ai, Jul 22 2026, mini-swe-agent bash-only harness): SWE-bench Verified 79.6% ±1.80, 13th of 75 systems. Added Jul 27, 2026 from a routine sweep. Statistically tied with Gemini 3.6 Flash, also 79.6%: the pooled standard error is about 2.5 points, so treat the two as level and the ordering between them as arbitrary. Cursor reports the model is built on Moonshot's open-weight Kimi K2.5 base with roughly 85% of total compute from Cursor's own post-training, but Composer 2.5 itself is not released, so it is listed as closed. Priced $0.50/$2.50 per 1M inside Cursor, with a faster variant at $3.00/$15.00. Context 200k. Released May 18, 2026.
what does Composer 2.5 cost?
$0.50 per 1M input tokens and $2.50 per 1M output — #3 cheapest of the 20 models we track. Coding workloads are output-heavy, so weight the output rate when budgeting. Run your own volume through the AI API cost calculator for a monthly estimate.
where can you use it?
Available via Cursor IDE and Cursor CLI only; no external API, no third-party gateway. As a proprietary model, you're on the maker's infrastructure and release schedule.
More coverageAI coding models on GENZ TECH
Ranked on our AI Coding Leaderboard — scores confirmed against primary sources only, updated 2026-07-27.