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Mistral Medium vs Kimi K2

0 vs 2 benchmarks won

Mistral
Mistral Medium
Moonshot AI
Kimi K2
Overview
CompanyMistralMoonshot AI
Release dateDec 2023Jul 11 2025
Model type
Open sourceNoYes
Specifications
Parameters
1T
Context window
128k
Benchmarks
Science reasoning
GPQA Diamond
75.1%
Software engineering
SWE-Bench Verified
65.8%
Multimodal understanding
MMMU
Timeline
Release gapMistral Medium shipped 588 days before Kimi K2

Which is better: Mistral Medium or Kimi K2?

Kimi K2 leads Mistral Medium on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Medium shipped 588 days before Kimi K2, so benchmark comparisons should account for the intervening progress.

Kimi K2 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 released?
Kimi K2 was released by Moonshot AI on Jul 11 2025.
Is Mistral Medium or Kimi K2 open source?
Kimi K2 is an open-source / open-weight model released by Moonshot AI. Mistral Medium is a proprietary model released by Mistral.

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