Composer 2.5 vs Grok 4.5
Cursor Composer 2.5 | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | Cursor | SpaceXAI |
| Release date | May 18 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. | 54% | 64.7%Best |
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%Best | 78% |
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 1.0Artificial 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% | 62%Best |
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% | 83.3%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% | — |
| Timeline | ||
| Release gap | Composer 2.5 shipped 51 days before Grok 4.5 | |
Which is better: Composer 2.5 or Grok 4.5?
Grok 4.5 leads Composer 2.5 on 3 of the 4 benchmarks they both report (SWE-Bench Pro, SWE-Bench Multilingual, DeepSWE 1.0, Terminal-Bench 2.1). Composer 2.5 shipped 51 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 Pro, Grok 4.5 leads at 64.7% vs Composer 2.5 at 54%. On SWE-Bench Multilingual, Composer 2.5 leads at 79.8% vs Grok 4.5 at 78%. On DeepSWE 1.0, Grok 4.5 leads at 62% vs Composer 2.5 at 18%. On Terminal-Bench 2.1, Grok 4.5 leads at 83.3% vs Composer 2.5 at 73%.
Frequently asked questions
Composer 2.5 was released by Cursor on May 18 2026.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Grok 4.5 leads on SWE-Bench Pro — Composer 2.5 54% vs Grok 4.5 64.7%.