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Claude Haiku 4.5 vs Mistral Medium 3

2 vs 0 benchmarks won

Anthropic
Claude Haiku 4.5
Mistral
Mistral Medium 3
Overview
CompanyAnthropicMistral
Release dateOct 15 2025May 7 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
73%
Software engineering
SWE-Bench Verified
73.3%
Multimodal understanding
MMMU
Timeline
Release gapMistral Medium 3 shipped 161 days before Claude Haiku 4.5

Which is better: Claude Haiku 4.5 or Mistral Medium 3?

Claude Haiku 4.5 leads Mistral Medium 3 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Mistral Medium 3 shipped 161 days before Claude Haiku 4.5, 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 Claude Haiku 4.5 released?
Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.
When was Mistral Medium 3 released?
Mistral Medium 3 was released by Mistral on May 7 2025.

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