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Mistral Medium 3.5 vs o1

Mistral Mistral Medium 3.5 vs OpenAI o1 — side-by-side specs.

Mistral
Mistral Medium 3.5
OpenAI
o1
Overview
CompanyMistralOpenAI
Release dateApr 30 2026Dec 5 2024
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapo1 shipped 511 days before Mistral Medium 3.5

Which is better: Mistral Medium 3.5 or o1?

Mistral Medium 3.5 and o1 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. o1 shipped 511 days before Mistral Medium 3.5, 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 Mistral Medium 3.5 released?
Mistral Medium 3.5 was released by Mistral on Apr 30 2026.
When was o1 released?
o1 was released by OpenAI on Dec 5 2024.

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