Composer 2 vs Grok 4.5
Cursor Composer 2 | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | Cursor | SpaceXAI |
| Release date | Mar 20 2026 | Jul 8 2026 |
| Access | Proprietary | Proprietary |
| 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. | — | 64.7% |
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. | 73.7% | 78%Best |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 52.2% | — |
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. | — | 62% |
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. | 75% | — |
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. | — | 83.3% |
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. | 61.7% | — |
| Timeline | ||
| Release gap | Composer 2 shipped 110 days before Grok 4.5 | |
Which is better: Composer 2 or Grok 4.5?
Grok 4.5 leads Composer 2 on 1 of the 1 benchmark they both report (SWE-Bench Multilingual). Composer 2 shipped 110 days before Grok 4.5, 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 SWE-Bench Multilingual, Grok 4.5 leads at 78% vs Composer 2 at 73.7%.
Frequently asked questions
Composer 2 was released by Cursor on Mar 20 2026.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Grok 4.5 leads on SWE-Bench Multilingual — Composer 2 73.7% vs Grok 4.5 78%.
Other comparisons
Composer 2 vs Claude Sonnet 5Grok 4.5 vs Claude Sonnet 5Composer 2 vs GPT-5.6 SolGrok 4.5 vs GPT-5.6 SolComposer 2 vs Gemini OmniGrok 4.5 vs Gemini OmniComposer 2 vs Muse SparkGrok 4.5 vs Muse SparkComposer 2 vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-ProComposer 2 vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5