Mistral

Mistral Medium 3.5

mistralai/mistral-medium-3-5
Released Apr 30, 2026Open Weights
ThinkingToolsVisionopen weights

Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI. It supports text and image inputs with text output, and is designed for agentic workflows, coding, and complex...

Cost / 1M tokens

Medium usage

$1.50

input

—

cached input

$7.50

output

Context Window

262K

Up to 210K max output

Modalities

text, image, file → text

Mistral tokenizer

Quickstart & API

mistralai/mistral-medium-3-5
Open the model picker in ChatOSS Desktop (Code, Kanban, or Chat) and select or paste this model ID.

Best for & Strengths

Key Strengths

Open weightsExtended reasoningTool & agent callingMultimodal vision

Recommended Workloads in ChatOSS

  • Coding agents
  • Complex reasoning & debugging
  • Screenshot-to-code workflows
Available in ChatOSS Code, Kanban Orchestrate, and Chat modes via Plus, Max, or BYOK.

Verified Evaluations

Benchmarks & Frontier Comparison

How Mistral Medium 3.5 compares against leading open-weight and proprietary frontier models across independent agentic coding and reasoning suites.

View full Top 40 Leaderboard →
Benchmark (Metric)Mistral Medium 3.5DeepSeek V4.1 FlashGLM 5.3Kimi K3.1 ProClaude Opus 5.5
Agentic & Software Engineering
ChatOSS Agentic Coding Index (%)—63.2%58.3%65%74.1%
SWE-Bench Verified (%)—91.5%95.4%94.8%97%
DeepSWE v1.1 (Pass@1 %)—77%69%73.5%74.2%
Vibe Code Bench v1.1 (%)—87.7%78.1%88.4%90.3%
Terminal-Bench 4.0 (%)—42.3%42%46.2%65.2%
Code Migration (%)—45.6%44.2%52%66.7%
Intelligence & Token Economics
Artificial Analysis Intelligence Index (0–100)14.239.544.855.157.6
Input Price (/ 1M tokens)$1.50$0.15$1.40$2.00$4.00
Output Price (/ 1M tokens)$7.50$0.60$4.40$10.00$20.00

Artificial Analysis Intelligence Index

Artificial Analysis

14.2

Active Provider Endpoints (3)

Upstream inference providers serving Mistral Medium 3.5, with per-provider pricing, context limits, quantization, and 24-hour uptime.

ProviderInput / 1MOutput / 1MCache Read / 1MContextMax OutputQuantizationUptime (24h)
Mistral
mistral/zdr
$1.50$7.50—262K210K—100.0%
Mistral
mistral
$1.50$7.50—262K210K—99.9%
Mistral
mistral/eu
$1.65$8.25—262K210K—100.0%

Supported API Parameters

Parameters accepted by this model when called through ChatOSS or OpenRouter.

frequency_penaltyinclude_reasoningmax_tokenspresence_penaltyreasoningreasoning_effortresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_p

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