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Mistral Small 3 vs GPT-5.4

0 vs 1 benchmarks won

Mistral
Mistral Small 3
OpenAI
GPT-5.4
Overview
CompanyMistralOpenAI
Release dateJan 2025Mar 5 2026
Model type
Open sourceYesNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
92.8%
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapMistral Small 3 shipped 428 days before GPT-5.4

Which is better: Mistral Small 3 or GPT-5.4?

GPT-5.4 leads Mistral Small 3 on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Small 3 shipped 428 days before GPT-5.4, so benchmark comparisons should account for the intervening progress.

Mistral Small 3 is an open-source / open-weight model; GPT-5.4 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 Mistral Small 3 released?
Mistral Small 3 was released by Mistral on Jan 2025.
When was GPT-5.4 released?
GPT-5.4 was released by OpenAI on Mar 5 2026.
Is Mistral Small 3 or GPT-5.4 open source?
Mistral Small 3 is an open-source / open-weight model released by Mistral. GPT-5.4 is a proprietary model released by OpenAI.

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