AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

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Mistral Medium 3.5 vs Kimi Linear

1 vs 0 benchmarks won

Mistral
Mistral Medium 3.5
Moonshot AI
Kimi Linear
Overview
CompanyMistralMoonshot AI
Release dateApr 29 2026Oct 2025
Model type
Open sourceYesYes
Specifications
Parameters
128B
48B
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
77.6%
Multimodal understanding
MMMU
Timeline
Release gapKimi Linear shipped 210 days before Mistral Medium 3.5

Which is better: Mistral Medium 3.5 or Kimi Linear?

Mistral Medium 3.5 leads Kimi Linear on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi Linear shipped 210 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.

Mistral Medium 3.5 has 128B parameters, while Kimi Linear has 48B.

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 3.5 released?
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
When was Kimi Linear released?
Kimi Linear was released by Moonshot AI on Oct 2025.

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