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Mistral Small 3 vs Kimi K2.5

0 vs 2 benchmarks won

Mistral
Mistral Small 3
Moonshot AI
Kimi K2.5
Overview
CompanyMistralMoonshot AI
Release dateJan 2025Jan 27 2026
Model type
Open sourceYesYes
Specifications
Parameters
1T
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
87.6%
Software engineering
SWE-Bench Verified
76.8%
Multimodal understanding
MMMU
Timeline
Release gapMistral Small 3 shipped 391 days before Kimi K2.5

Which is better: Mistral Small 3 or Kimi K2.5?

Kimi K2.5 leads Mistral Small 3 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Small 3 shipped 391 days before Kimi K2.5, 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 Small 3 released?
Mistral Small 3 was released by Mistral on Jan 2025.
When was Kimi K2.5 released?
Kimi K2.5 was released by Moonshot AI on Jan 27 2026.

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