Cursor Composer 1.5 vs OpenAI GPT-5.3-Codex-Spark — side-by-side specs.
Cursor Composer 1.5 | OpenAI GPT-5.3-Codex-Spark | |
|---|---|---|
| Overview | ||
| Company | Cursor | OpenAI |
| Release date | Feb 8 2026 | Feb 12 2026 |
| Model type | — | — |
| Open source | No | No |
| Specifications | ||
Parameters | — | — |
Context window | — | 128k |
| Benchmarks | ||
| Timeline | ||
| Release gap | Composer 1.5 shipped 4 days before 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.