AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

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Gemini 3.1 Pro vs Mistral Medium 3.5

2 vs 0 benchmarks won

Google
Gemini 3.1 Pro
Mistral
Mistral Medium 3.5
Overview
CompanyGoogleMistral
Release dateFeb 19 2026Apr 30 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
94.3%
Software engineering
SWE-Bench Verified
80.6%
Multimodal understanding
MMMU
Timeline
Release gapGemini 3.1 Pro shipped 70 days before Mistral Medium 3.5

Which is better: Gemini 3.1 Pro or Mistral Medium 3.5?

Gemini 3.1 Pro leads Mistral Medium 3.5 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Gemini 3.1 Pro shipped 70 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 Gemini 3.1 Pro released?
Gemini 3.1 Pro was released by Google on Feb 19 2026.
When was Mistral Medium 3.5 released?
Mistral Medium 3.5 was released by Mistral on Apr 30 2026.

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