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Mistral Medium vs Kimi K2 Thinking

0 vs 1 benchmarks won

Mistral
Mistral Medium
Moonshot AI
Kimi K2 Thinking
Overview
CompanyMistralMoonshot AI
Release dateDec 2023Nov 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 shipped 706 days before Kimi K2 Thinking

Which is better: Mistral Medium or Kimi K2 Thinking?

Kimi K2 Thinking leads Mistral Medium on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Medium shipped 706 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 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 released?
Mistral Medium was released by Mistral on Dec 2023.
When was Kimi K2 Thinking released?
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Is Mistral Medium or Kimi K2 Thinking open source?
Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Mistral Medium is a proprietary model released by Mistral.

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