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DeepSeek-V4-Flash vs Mistral Medium 3.5

1 vs 1 benchmarks won

DeepSeek
DeepSeek-V4-Flash
Mistral
Mistral Medium 3.5
Overview
CompanyDeepSeekMistral
Release dateApr 24 2026Apr 29 2026
Model type
Open sourceYesYes
Specifications
Parameters
128B
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
88.1%
Software engineering
SWE-Bench Verified
77.6%
Multimodal understanding
MMMU
Timeline
Release gapDeepSeek-V4-Flash shipped 5 days before Mistral Medium 3.5

Which is better: DeepSeek-V4-Flash or Mistral Medium 3.5?

DeepSeek-V4-Flash and Mistral Medium 3.5 are evenly matched across the benchmarks they both publish. DeepSeek-V4-Flash shipped 5 days before Mistral Medium 3.5, 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 DeepSeek-V4-Flash released?
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
When was Mistral Medium 3.5 released?
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.

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