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Mistral Small 3.1 vs o3-mini

Mistral Mistral Small 3.1 vs OpenAI o3-mini — side-by-side specs.

Mistral
Mistral Small 3.1
OpenAI
o3-mini
Overview
CompanyMistralOpenAI
Release dateMar 17 2025Jan 31 2025
Model type
Open sourceYesNo
Specifications
Parameters
Context window
Benchmarks
Timeline
Release gapo3-mini shipped 45 days before Mistral Small 3.1

Which is better: Mistral Small 3.1 or o3-mini?

Mistral Small 3.1 and o3-mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o3-mini shipped 45 days before Mistral Small 3.1, so benchmark comparisons should account for the intervening progress.

Mistral Small 3.1 is an open-source / open-weight model; o3-mini is proprietary.

Direct benchmark comparisons are unavailable — Mistral Small 3.1 and o3-mini don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Mistral Small 3.1 released?
Mistral Small 3.1 was released by Mistral on Mar 17 2025.
When was o3-mini released?
o3-mini was released by OpenAI on Jan 31 2025.
Is Mistral Small 3.1 or o3-mini open source?
Mistral Small 3.1 is an open-source / open-weight model released by Mistral. o3-mini is a proprietary model released by OpenAI.

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