How much does Mistral Small 4 cost?

Mistral Small 4 costs $0.15/M input tokens and $0.60/M output tokens, with separate rates for Cache Read at $0.015/M tokens.

What is the context length of Mistral Small 4?

Mistral Small 4 has a 262,144 token context window. It supports up to 262,144 completion tokens.

Does Mistral Small 4 support tool calling and structured outputs?

Yes. Mistral Small 4 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

What inputs and outputs does Mistral Small 4 support?

Mistral Small 4 accepts text and images as input and returns text.

Which providers serve Mistral Small 4?

Mistral Small 4 is served by 1 provider on OpenRouter: Mistral.

What other text models does Mistral have?

Mistral Large 4, Mistral Medium 3.5, Devstral 2 2512 and 16 more are other text models from Mistral.

When was Mistral Small 4 released?

Mistral Small 4 was released on March 16, 2026.

Mistral: Mistral Small 4

mistralai/mistral-small-2603

Model weights

Compare

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. It combines strong reasoning from Magistral, multimodal understanding from Pixtral, and agentic coding capabilities from Devstral, enabling one model to handle complex analysis, software development, and visual tasks within the same workflow.

Modalities

In / out price

$0.15 / $0.60per 1M

Context

262K

Released

Mar 16, 2026

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


$0.165	$0.66	$0.0165	0.47s	113 tok/s	99.90%
$0.15	$0.60	$0.015	0.51s	105 tok/s	99.91%
$0.165	$0.66	$0.0165	0.46s	110 tok/s	99.33%

Input $0.165Output $0.66
113 tok/s99.90% uptime
Input $0.15Output $0.60
105 tok/s99.91% uptime
Input $0.165Output $0.66
110 tok/s99.33% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$0.077/M tokens

Output

$0.6291/M tokens

Mistral Small 4 — Price history

Price history

No effective price data for this selection

$0.0649	$0.599	63.0%	67.3%
$0.0935	$0.659	48.1%	20.4%
$0.1234	$0.659	27.9%	12.3%

Effective in $0.0649Effective out $0.599
Token share
67.3%
Effective in $0.0935Effective out $0.659
Token share
20.4%
Effective in $0.1234Effective out $0.659
Token share
12.3%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.94%

Availability over the last 3 days

Last 72 hours

Availability 99.94%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.96%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Mistral: Mistral Small 4 (Artificial Analysis and Vals AI)
Source	Benchmark	Score
Artificial Analysis	Mistral Small 4 (Reasoning) Intelligence Index	4.3
Artificial Analysis	Mistral Small 4 (Reasoning) Coding Index	26.6
Artificial Analysis	Mistral Small 4 (Reasoning) Agentic Index	0.8
Artificial Analysis	Mistral Small 4 (Reasoning) GPQA Diamond	76.9%
Artificial Analysis	Mistral Small 4 (Reasoning) HLE	9.9%
Artificial Analysis	Mistral Small 4 (Reasoning) IFBench	48.2%
Artificial Analysis	Mistral Small 4 (Reasoning) τ²-Bench Telecom	41.2%
Artificial Analysis	Mistral Small 4 (Reasoning) AA-LCR	49.7%
Artificial Analysis	Mistral Small 4 (Reasoning) τ-Bench Banking	4.9%
Artificial Analysis	Mistral Small 4 (Reasoning) GDPval-AA	0.0%
Artificial Analysis	Mistral Small 4 (Reasoning) CritPt	0.3%
Artificial Analysis	Mistral Small 4 (Reasoning) SciCode	38.8%
Artificial Analysis	Mistral Small 4 (Reasoning) Terminal-Bench Hard	17.4%
Artificial Analysis	Mistral Small 4 (Reasoning) Terminal-Bench 4.0	0.0%
Artificial Analysis	Mistral Small 4 (Reasoning) Terminal-Bench 2.1	21.0%
Artificial Analysis	Mistral Small 4 (Reasoning) AA-Omniscience Accuracy	21.4%
Artificial Analysis	Mistral Small 4 (Reasoning) AA-Omniscience Non-Hallucination Rate	33.4%
Artificial Analysis	Mistral Small 4 (Non-reasoning) GPQA Diamond	57.1%
Artificial Analysis	Mistral Small 4 (Non-reasoning) HLE	3.8%
Artificial Analysis	Mistral Small 4 (Non-reasoning) IFBench	32.8%
Artificial Analysis	Mistral Small 4 (Non-reasoning) τ²-Bench Telecom	18.4%
Artificial Analysis	Mistral Small 4 (Non-reasoning) AA-LCR	28.3%
Artificial Analysis	Mistral Small 4 (Non-reasoning) CritPt	0.3%
Artificial Analysis	Mistral Small 4 (Non-reasoning) Terminal-Bench Hard	10.6%
Vals AI	Mistral Small 4 SAGE	59.2%
Vals AI	Mistral Small 4 Terminal-Bench 2.0	16.9%
Vals AI	Mistral Small 4 Vals Index	29.1%
Vals AI	Mistral Small 4 Vibe Code Bench v1.1	0.0%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

claude-mem

Memory for Claude Code

1.35Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

534Mtokens

shuri-hal-api

new

505Mtokens

OpenClaw

OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.

404Mtokens

Westbahn Scout

new

318Mtokens

Rest of OpenRouter

551M

Top 5 Apps

25.5M

Available through EU in-region routing

Mistral: Mistral Small 4 is available through EU in-region routing. Requests sent to eu.openrouter.ai are decrypted in the EU and routed only to shared provider endpoints in Europe (the EU/EEA, the UK, and Switzerland).

Providers in Europe

Mistral

Prices in Europe

Mistral: $0.165/M tokens input, $0.66/M tokens output

Base URL

https://eu.openrouter.ai/api/v1

Plan

Requires Business or Enterprise. Self-serve on Business: no contract, no monthly minimum. OpenRouter Business for EU in-region routing

Fails closed: if no shared provider endpoint in Europe is available, the request errors instead of leaving the region. Requests served by your own BYOK key go to your deployment’s region, which you control. In-region routing docs

More models from Mistral

Voxtral TTS 3

Voxtral TTS 3 is Mistral's text-to-speech model. It converts text into natural-sounding speech, offers a library of preset voices, supports zero-shot voice cloning, and accepts emotion and pace tags in the input to control delivery. It streams audio with low time-to-first-audio and suits voice agents, narration, and multilingual assistants.

Speech$13/M characters

Voxtral Small Transcribe 3

Voxtral Small Transcribe 3 is Mistral's flagship speech-to-text model. It takes audio input and returns a transcript with timestamps and speaker diarization, and supports context biasing for domain-specific vocabulary. Suited for high-accuracy multilingual transcription of meetings, interviews, media, and support calls.

Transcription$0.000067/second

Voxtral Mini Transcribe 3

Voxtral Mini Transcribe 3 is Mistral's compact speech-to-text model. It takes audio input and returns a transcript with timestamps and speaker diarization. It also supports context biasing for domain terms. It is small enough to self-deploy in resource-constrained environments, and fits meeting notes, call analytics, and voice-agent pipelines where cost matters.

Transcription$0.000058/second

Mistral Large 4

Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads. It offers a 1M-token context window with up to 256K output tokens, and supports tool calling and structured outputs.

Text1.0M context$0.70 / $2.10

Voxtral Small 24B 2507 STT

Voxtral Small 24B 2507 STT is a speech transcription model from Mistral AI. It is suited for transcription, translation, and audio understanding workloads that benefit from its larger model capacity.

Transcription$0.00005/second

Voxtral Mini 3B 2507

Voxtral Mini 3B 2507 is a speech and audio understanding model from Mistral AI. It is suited for transcription, translation, and compact audio processing workloads.

Transcription$0.000017/second

Voxtral Mini Transcribe

Voxtral Mini Transcribe is Mistral's speech-to-text model, derived from the Voxtral Mini family. It accepts audio input and returns transcribed text via the standard transcription API. Suited for transcribing meetings, voice notes, podcasts, and other spoken content.

Transcription$0.00005/second

Mistral Medium 3.5

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 multi-step reasoning. It is particularly strong at reliable multi-tool calling and long-horizon tasks, with a 256K context window, configurable reasoning effort per request, and a custom vision encoder that handles variable image sizes and aspect ratios. Self-hostable on as few as four GPUs and available under open weights.

Text262K context$1.50 / $7.50

Mistral Medium 3.5 (batch)

Text262K context$0.75 / $3.75

Voxtral Mini TTS

Voxtral Mini TTS is Mistral's text-to-speech model featuring zero-shot voice cloning and multilingual support. It converts text input into natural-sounding audio output.

Speech$16/M characters

Mistral Small Creative

Mistral Small Creative is an experimental small model designed for creative writing, narrative generation, roleplay and character-driven dialogue, general-purpose instruction following, and conversational agents.

Text33K context

Devstral 2 2512

Devstral 2 is a state-of-the-art open-source model by Mistral AI specializing in agentic coding. It is a 123B-parameter dense transformer model supporting a 256K context window.

Devstral 2 supports exploring codebases and orchestrating changes across multiple files while maintaining architecture-level context. It tracks framework dependencies, detects failures, and retries with corrections—solving challenges like bug fixing and modernizing legacy systems. The model can be fine-tuned to prioritize specific languages or optimize for large enterprise codebases. It is available under a modified MIT license.

Text262K context$0.40 / $2

Ministral 3 14B 2512

The largest model in the Ministral 3 family, Ministral 3 14B offers frontier capabilities and performance comparable to its larger Mistral Small 3.2 24B counterpart. A powerful and efficient language model with vision capabilities.

Text262K context$0.20 / $0.20

Ministral 3 8B 2512

A balanced model in the Ministral 3 family, Ministral 3 8B is a powerful, efficient tiny language model with vision capabilities.

Text262K context$0.15 / $0.15

Ministral 3 3B 2512

The smallest model in the Ministral 3 family, Ministral 3 3B is a powerful, efficient tiny language model with vision capabilities.

Text131K context$0.10 / $0.10

Mistral Large 3 2512

Mistral Large 3 2512 is Mistral’s most capable model to date, featuring a sparse mixture-of-experts architecture with 41B active parameters (675B total), and released under the Apache 2.0 license.

Text262K context$0.50 / $1.50

Mistral Embed 2312

Mistral Embed is a specialized embedding model for text data, optimized for semantic search and RAG applications. Developed by Mistral AI in late 2023, it produces 1024-dimensional vectors that effectively capture semantic relationships in text.

Embeddings$0.10/M tokens

Codestral Embed 2505

Mistral Codestral Embed is specially designed for code, perfect for embedding code databases, repositories, and powering coding assistants with state-of-the-art retrieval.

Embeddings$0.15/M tokens

Voxtral Small 24B 2507

Voxtral Small is an enhancement of Mistral Small 3, incorporating state-of-the-art audio input capabilities while retaining best-in-class text performance. It excels at speech transcription, translation and audio understanding. Input audio is priced at $100 per million seconds.

Text33K context$0.10 / $0.30

Mistral Medium 3.1

Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances state-of-the-art reasoning and multimodal performance with 8× lower cost compared to traditional large models, making it suitable for scalable deployments across professional and industrial use cases.

The model excels in domains such as coding, STEM reasoning, and enterprise adaptation. It supports hybrid, on-prem, and in-VPC deployments and is optimized for integration into custom workflows. Mistral Medium 3.1 offers competitive accuracy relative to larger models like Claude Sonnet 3.5/3.7, Llama 4 Maverick, and Command R+, while maintaining broad compatibility across cloud environments.

Text131K context$0.40 / $2

Mistral: Mistral Small 4

Providers