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Magistral Small vs o3

Mistral Magistral Small vs OpenAI o3 — side-by-side specs.

Mistral
Magistral Small
OpenAI
o3
Overview
CompanyMistralOpenAI
Release dateJun 10 2025Apr 16 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapo3 shipped 55 days before Magistral Small

Which is better: Magistral Small or o3?

Magistral Small and o3 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. o3 shipped 55 days before Magistral Small, 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 — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Magistral Small released?
Magistral Small was released by Mistral on Jun 10 2025.
When was o3 released?
o3 was released by OpenAI on Apr 16 2025.

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