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Composer vs o1

Cursor Composer vs OpenAI o1 — side-by-side specs.

Cursor
Composer
OpenAI
o1
Overview
CompanyCursorOpenAI
Release dateOct 29 2025Dec 5 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapo1 shipped 328 days before Composer

Which is better: Composer or o1?

Composer and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1 shipped 328 days before Composer, 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 and o1 don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Composer released?
Composer was released by Cursor on Oct 29 2025.
When was o1 released?
o1 was released by OpenAI on Dec 5 2024.

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