Mistral Medium 3.5

Name: Mistral Medium 3.5
Author: Mistral

Mistral · Released Apr 30, 2026 · Closed weights

Mistral model for multilingual chat, reasoning, and tool-assisted workflows

Price per 1M tokens: $1.5 / $7.5
Context window: 262.1K
Since the last one: 261 days

Open in the timeline

Since Mistral Medium 3.1

3 releases in the Mistral Medium line.

Mistral Medium 3May 7, 202597dMistral Medium 3.1Aug 12, 2025260dMistral Medium 3.5Apr 29, 2026

Released261 days later

Price in / out$1.5 / $7.5+275%

Context262.1K2.0×

ECI STANDING#115 of 270

SCORE141.36138.5–144.33 CI

FRONTIER LAGLaunched 16.3 months behindScores about what o1 did in December 2024.

SCORES LIKE THESE MODELSClaude Sonnet 4Anthropic · May 2025141.56

Gemini 2.5 Flash (May 2025)Google DeepMind · May 2025141.43

DeepSeek-R1 (May 2025)DeepSeek · May 2025141.13

Claude 3.7 SonnetAnthropic · Feb 2025141.03

Full Epoch Capabilities Index ranking ↗

Epoch benchmark boards

Best result on each board it has run. The tick marks the leader.

WeirdML

44%#71 of 141

DTBench

76%#98 of 179

ProofBench

9%#69 of 81

Surface Evolver Bench

27%#23 of 26

FrontierCode

8%#46 of 46

Mistral's past year

15 release days in the past year, about one every 24 days. The next is expected around Nov 13, 2026. Forecasts ↗

NovDecJanFebMarAprMayJunJulAugSepOctNov

Specifications

RELEASE DATEApr 30, 2026

WEIGHTSClosed weights

CONTEXT WINDOW262.1K

MAX OUTPUT209.7K

REASONINGNot listed

TOOL CALLINGNot listed

INPUTStext, image/png, image/jpeg, image/webp, image/gif, application/pdf

OUTPUTStext

Models.dev record ↗

Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.