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Mistral Small vs Kimi K2 Thinking

0 vs 1 benchmarks won

Mistral
Mistral Small
Moonshot AI
Kimi K2 Thinking
Overview
CompanyMistralMoonshot AI
Release dateFeb 26 2024Nov 6 2025
Model type
Open sourceNoYes
Specifications
Parameters
1T
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
71.3%
Multimodal understanding
MMMU
Timeline
Release gapMistral Small shipped 619 days before Kimi K2 Thinking

Which is better: Mistral Small or Kimi K2 Thinking?

Kimi K2 Thinking leads Mistral Small on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Small shipped 619 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.

Kimi K2 Thinking 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 Thinking released?
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Is Mistral Small or Kimi K2 Thinking open source?
Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Mistral Small is a proprietary model released by Mistral.

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