Composer 1.5 vs GPT-5.3-Codex-Spark
Cursor Composer 1.5 | OpenAI GPT-5.3-Codex-Spark | |
|---|---|---|
| Overview | ||
| Company | Cursor | OpenAI |
| Release date | Feb 8 2026 | Feb 12 2026 |
| Access | Proprietary | Proprietary |
| Specifications | ||
Context window | — | 128k |
| Benchmarks | ||
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. | 67% | — |
| Timeline | ||
| Release gap | Composer 1.5 shipped 4 days before GPT-5.3-Codex-Spark | |
Which is better: Composer 1.5 or GPT-5.3-Codex-Spark?
Composer 1.5 and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Composer 1.5 shipped 4 days before GPT-5.3-Codex-Spark, 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.
Direct benchmark comparisons are unavailable — Composer 1.5 and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 1.5 was released by Cursor on Feb 8 2026.
GPT-5.3-Codex-Spark was released by OpenAI on Feb 12 2026.
Other comparisons
Composer 1.5 vs Claude Sonnet 5GPT-5.3-Codex-Spark vs Claude Sonnet 5Composer 1.5 vs Gemini OmniGPT-5.3-Codex-Spark vs Gemini OmniComposer 1.5 vs Muse Spark 1.1GPT-5.3-Codex-Spark vs Muse Spark 1.1Composer 1.5 vs Grok 4.5GPT-5.3-Codex-Spark vs Grok 4.5Composer 1.5 vs DeepSeek-V4-ProGPT-5.3-Codex-Spark vs DeepSeek-V4-ProComposer 1.5 vs Mistral Medium 3.5GPT-5.3-Codex-Spark vs Mistral Medium 3.5