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Composer vs Devstral 2 (123B)

Cursor Composer vs Mistral Devstral 2 (123B) — side-by-side specs.

Cursor
Composer
Mistral
Devstral 2 (123B)
Overview
CompanyCursorMistral
Release dateOct 29 2025Dec 9 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapComposer shipped 41 days before Devstral 2 (123B)

Which is better: Composer or Devstral 2 (123B)?

Composer and Devstral 2 (123B) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Composer shipped 41 days before Devstral 2 (123B), so benchmark comparisons should account for the intervening progress.

Devstral 2 (123B) is an open-source / open-weight model; Composer is proprietary.

Direct benchmark comparisons are unavailable — Composer and Devstral 2 (123B) 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 Devstral 2 (123B) released?
Devstral 2 (123B) was released by Mistral on Dec 9 2025.
Is Composer or Devstral 2 (123B) open source?
Devstral 2 (123B) is an open-source / open-weight model released by Mistral. Composer is a proprietary model released by Cursor.

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