Composer 2.5vsMuse Spark 1.2
Composer 2.5 | Muse Spark 1.2 | |
|---|---|---|
| Specifications | ||
Context window | — | 1M |
| Benchmarks | ||
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | 54% | — |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | 79.8% | — |
Agentic coding CursorBench v3.2Cursor's own test of harder, real-world coding tasks inside a code editor, on the refreshed v3.2 task set. Scores aren't comparable with v3.1. Higher is better. | 56.1% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 63.2% | — |
Agentic coding DeepSWE 1.1Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | — | 59.3% |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | 18% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 92% | — |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 73% | 82.9%Best |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | 69.3% | — |
| Overview | ||
| Company | Cursor | Meta |
| Release date | May 18 2026 | Aug 5 2026 |
| Access | Proprietary | Proprietary |
Which is better: Composer 2.5 or Muse Spark 1.2?
Muse Spark 1.2 leads Composer 2.5 on 1 of the 1 benchmark they both report (Terminal-Bench 2.1). Composer 2.5 shipped 79 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On Terminal-Bench 2.1, Muse Spark 1.2 leads at 82.9% vs Composer 2.5 at 73%.
Frequently asked questions
Composer 2.5 was released by Cursor on May 18 2026.
Muse Spark 1.2 was released by Meta on Aug 5 2026.
Muse Spark 1.2 leads on Terminal-Bench 2.1 — Composer 2.5 73% vs Muse Spark 1.2 82.9%.
Other comparisons
Composer 2.5vsClaude Opus 5Muse Spark 1.2vsClaude Opus 5Composer 2.5vsGPT-5.6 SolMuse Spark 1.2vsGPT-5.6 SolComposer 2.5vsGemini 3.6 FlashMuse Spark 1.2vsGemini 3.6 FlashComposer 2.5vsGrok 4.5Muse Spark 1.2vsGrok 4.5Composer 2.5vsDeepSeek-V4-Flash-0731Muse Spark 1.2vsDeepSeek-V4-Flash-0731Composer 2.5vsMistral Medium 3.5Muse Spark 1.2vsMistral Medium 3.5