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Gemini 3.1 Pro vs Devstral Small 2 (24B)

2 vs 0 benchmarks won

Google
Gemini 3.1 Pro
Mistral
Devstral Small 2 (24B)
Overview
CompanyGoogleMistral
Release dateFeb 19 2026Dec 9 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
94.3%
Software engineering
SWE-Bench Verified
80.6%
Multimodal understanding
MMMU
Timeline
Release gapDevstral Small 2 (24B) shipped 72 days before Gemini 3.1 Pro

Which is better: Gemini 3.1 Pro or Devstral Small 2 (24B)?

Gemini 3.1 Pro leads Devstral Small 2 (24B) on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Devstral Small 2 (24B) shipped 72 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.

Devstral Small 2 (24B) is an open-source / open-weight model; Gemini 3.1 Pro 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 Gemini 3.1 Pro released?
Gemini 3.1 Pro was released by Google on Feb 19 2026.
When was Devstral Small 2 (24B) released?
Devstral Small 2 (24B) was released by Mistral on Dec 9 2025.
Is Gemini 3.1 Pro or Devstral Small 2 (24B) open source?
Devstral Small 2 (24B) is an open-source / open-weight model released by Mistral. Gemini 3.1 Pro is a proprietary model released by Google.

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