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Devstral 2 (123B) vs Kimi K2 Thinking

0 vs 1 benchmarks won

Mistral
Devstral 2 (123B)
Moonshot AI
Kimi K2 Thinking
Overview
CompanyMistralMoonshot AI
Release dateDec 9 2025Nov 6 2025
Model type
Open sourceYesYes
Specifications
Parameters
1T
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
71.3%
Multimodal understanding
MMMU
Timeline
Release gapKimi K2 Thinking shipped 33 days before Devstral 2 (123B)

Which is better: Devstral 2 (123B) or Kimi K2 Thinking?

Kimi K2 Thinking leads Devstral 2 (123B) on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi K2 Thinking shipped 33 days before Devstral 2 (123B), so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

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 Devstral 2 (123B) released?
Devstral 2 (123B) was released by Mistral on Dec 9 2025.
When was Kimi K2 Thinking released?
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.

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