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Composer vs DeepSeek Coder

Cursor Composer vs DeepSeek DeepSeek Coder — side-by-side specs.

Cursor
Composer
DeepSeek
DeepSeek Coder
Overview
CompanyCursorDeepSeek
Release dateOct 29 2025Nov 2 2023
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapDeepSeek Coder shipped 727 days before Composer

Which is better: Composer or DeepSeek Coder?

Composer and DeepSeek Coder do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. DeepSeek Coder shipped 727 days before Composer, so benchmark comparisons should account for the intervening progress.

DeepSeek Coder is an open-source / open-weight model; Composer is proprietary.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Composer released?
Composer was released by Cursor on Oct 29 2025.
When was DeepSeek Coder released?
DeepSeek Coder was released by DeepSeek on Nov 2 2023.
Is Composer or DeepSeek Coder open source?
DeepSeek Coder is an open-source / open-weight model released by DeepSeek. Composer is a proprietary model released by Cursor.

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