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Mistral Medium 3 vs Kimi K2 Thinking

0 vs 1 benchmarks won

Mistral
Mistral Medium 3
Moonshot AI
Kimi K2 Thinking
Overview
CompanyMistralMoonshot AI
Release dateMay 7 2025Nov 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 Medium 3 shipped 183 days before Kimi K2 Thinking

Which is better: Mistral Medium 3 or Kimi K2 Thinking?

Kimi K2 Thinking leads Mistral Medium 3 on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Medium 3 shipped 183 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 Medium 3 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 Medium 3 released?
Mistral Medium 3 was released by Mistral on May 7 2025.
When was Kimi K2 Thinking released?
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Is Mistral Medium 3 or Kimi K2 Thinking open source?
Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Mistral Medium 3 is a proprietary model released by Mistral.

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