Mistral: Mistral Small 4

apache-2.0

Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system.

Context
262K
Max output
210K
Input price
$0.15/1M tokens
Output price
$0.6/1M tokens
Alias ofmistralai/mistral-small

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Fine-tuning

Details

Model IDmistralai/mistral-small-2603
Provider OpenRouter
Creator Mistral AI
Familymistral-small
Licenseapache-2.0
Status—
Typechat
Input modalitiestext, image
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window262K tokens
Max input—
Max output210K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.15
Output
$0.6
Cache write
—
Cache read
$0.02
Batch in
—
Batch out
—

Family Comparison: mistral-small

ModelContextMax outPricing
Mistral: Mistral Small 3.1 24B (free)128K——
Mistral: Mistral Small 333K16K$0.05$0.08
Mistral: Mistral Small 4 (batch)262K210K$0.08$0.3
Mistral: Mistral Small 3.2 24B256K16K$0.08$0.2
Mistral: Mistral Small Creative33K—$0.1$0.3
Mistral: Mistral Small 4262K210K$0.15$0.6
Mistral: Mistral Small 3.1 24B128K102K$0.35$0.56

API

GET/v1/models/openrouter/mistralai/mistral-small-2603

Mistral: Mistral Small 4

mistralai/mistral-small-2603

Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system.

alias → mistralai/mistral-small
Changes · 6 entries
mistralai/mistral-small-2603updateca7a400Nov 2, 2026, 03:02 AM
max_output_tokens209715
mistralai/mistral-small-2603updatee3d7dedAug 31, 2026, 04:13 AM
max_output_tokens209715
mistralai/mistral-small-2603update1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
mistralai/mistral-small-2603update2b100acMar 23, 2026, 05:30 AM
release_date2026-03-16
aliasmistralai/mistral-small
taglineMistral Small 4 is the next major release in the Mistral ...
tools["function_calling"]
mistralai/mistral-small-2603update7a4f1f6Mar 22, 2026, 05:43 AM
model_typechat
mistralai/mistral-small-2603create7f5c66fMar 21, 2026, 05:16 AM