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Mistral Medium 3.5

MistralMistralOpen WeightModified MIT License

Description

Mistral Medium 3.5 is Mistral AI's first flagship merged model: a dense 128B-parameter multimodal model with a 256k context window that unifies instruction-following, reasoning, and coding capabilities in a single set of weights. It replaces Mistral Medium 3.1 and Magistral in Le Chat, and Devstral 2 in the Vibe coding agent. Reasoning effort is configurable per request, and the vision encoder was trained from scratch to handle variable image sizes and aspect ratios. Released as open weights under a Modified MIT License.

Release Date
2026-04-29
Parameters
128.0B
Context Length
262K
Modalities
image, text

Capability Radar

27
general
46
coding
75
reasoning
50
science
10
agents
75
multimodal

Rankings

Domain#RankScoreSource
Agentic Capability120
35.0
LS
Code Ranking156
62.0
AA
General Ranking118
67.0
AA
Science197
55.0
AA

Benchmark Scores (LLM Stats)

(LLM Stats (zeroeval))

Agents

Tau3 Telecom91.4%SR
Tau3 Retail76.1%SR
Tau3 Airline72.0%SR
BrowseCompOpenAI (2025)48.6%SR
Finance Agent v232.1%
Tau3 Banking13.4%SR

Code

SWE-Bench Verified77.6%SR

General

IFBench69.0%SR

Language

COLLIE95.8%SR

Math

AIME 202586.3%SR
Beyond AIME66.9%SR

AA Evaluation Indices

(Artificial Analysis)
Coding Index(Artificial Analysis)
46.9
Intelligence Index(Artificial Analysis)
30.4
Tau2(Sierra + U Toronto + Vector Institute (2025))
0.9
Gpqa(NYU + Cohere + Anthropic (2023))
0.7
Ifbench(Google Research (2023))
0.7
Lcr(Artificial Analysis)
0.7
Terminalbench V2 1
0.5
Scicode(UIUC + Argonne National Lab (2024))
0.4
Terminalbench Hard(Stanford × Laude Institute (2026))
0.3
Tau Banking
0.2
Hle(Center for AI Safety + Scale AI (2025))
0.1

LLM Stats Category Scores

(LLM Stats (zeroeval))
Language
100
Writing
100
Math
80
Frontend Development
80
Code
80
Instruction Following
70
Reasoning
60
General
60
Search
50
Finance
30
Agents
30
Tool Calling
10

Pricing

Input Price$1.5 / 1M tokens
Output Price$7.5 / 1M tokens
Blended Price (3:1)$3 / 1M tokens

Speed

Tokens/sec121.9
Time to First Token0.81s
Time to Answer17.22s

Provider Price Ranking

Provider Price Ranking

4 providers

Cheapest: Mistral AIMost Expensive: Kilo Gateway
ProviderInputOutput
1Mistral AICheapest
$0
$0.00001
2MistralPRIMARY
$1.5
$7.5
3OpenRouter
$1.5
$7.5
4Kilo Gateway
$1.5
$7.5

Compare pricing across different API providers for this model.

External Sources

LLM StatsArtificial Analysis