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Mistral Small vs Kimi K2.5

0 vs 2 benchmarks won

Mistral
Mistral Small
Moonshot AI
Kimi K2.5
Overview
CompanyMistralMoonshot AI
Release dateFeb 26 2024Jan 27 2026
Model type
Open sourceNoYes
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 shipped 701 days before Kimi K2.5

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

Kimi K2.5 leads Mistral Small on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Small shipped 701 days before Kimi K2.5, so benchmark comparisons should account for the intervening progress.

Kimi K2.5 is an open-source / open-weight model; Mistral Small is proprietary.

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 released?
Mistral Small was released by Mistral on Feb 26 2024.
When was Kimi K2.5 released?
Kimi K2.5 was released by Moonshot AI on Jan 27 2026.
Is Mistral Small or Kimi K2.5 open source?
Kimi K2.5 is an open-source / open-weight model released by Moonshot AI. Mistral Small is a proprietary model released by Mistral.

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