Mistral Small 4
Mistral Small 4 is a reasoning model from Mistral released on Mar 16, 2026. It reads text and images and writes text, with a 32K token context window and up to 32K tokens per reply.
Show moreShow less
It costs $0.40 per million input tokens and $1.40 per million output tokens. Cached input bills at $0.20, 50% less than fresh input.
It supports tool calling, structured JSON output and prompt caching, and its weights are open, so you can host it yourself.
3 providers serve it, including Pioneer, Infomaniak and NanoGPT. The lowest input price is $0.15 per million tokens at Pioneer.
This is the same model as Mistral Small 4, listed here under an earlier id. Prices and providers are kept current on that page.
- Modalities
- In / out price
- $0.40 / $1.40 per 1M
- Context
- 32K
- Max output
- 32K
- Released
- Mar 16, 2026
- Knowledge cutoff
- Jun 2025
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Mistral Small 4 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.40 / 1M tokens | |
|---|---|---|
| Output | $1.40 / 1M tokens | |
| Cached input (read) | $0.20 / 1M tokens | 50% off input |
Mistral Small 4 providers
3 providers serve it, including Pioneer, Infomaniak and NanoGPT. The lowest input price is $0.15 per million tokens at Pioneer. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Pioneer | $0.15 | $0.60 | $0.015 | 32K | 32K |
| Infomaniak | $0.25 | $0.93 | – | 256K | 256K |
| NanoGPT | $0.40 | $1.40 | $0.20 | 262K | 16K |
What Mistral Small 4 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Mistral Small 4 through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
Alternatives to Mistral Small 4
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- Index 17.5
Reads text and images. Tool calling, structured output, reasoning. Served by 12 providers.
by metaAug 10, 2026131K context$0.35/M input tokens$1.50/M output tokens12 providers
- Index 13.1
Reads text and images. Tool calling, structured output, reasoning. Served by 2 providers.
by cohereMay 20, 2026192K context$0.30/M input tokens$1.50/M output tokens2 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 25 providers.
by googleFeb 18, 2026$0.25/M input tokens$1.50/M output tokens25 providers
- Index 46.3
Reads text, images, audio and video. Tool calling, structured output, reasoning. Served by 17 providers.
by xiaomiSep 22, 20261.05M context$0.435/M input tokens$0.87/M output tokens17 providers
- Index 29.2
Reads text, images and video. Tool calling, structured output, reasoning. Served by 42 providers.
by minimaxMay 31, 20261M context$0.30/M input tokens$1.20/M output tokens42 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 39 providers.
by openaiJul 9, 2026$0.20/M input tokens$1.20/M output tokens39 providers
More from Mistral
- Index 38.4
Reads text and images. Tool calling, structured output, reasoning. Served by 8 providers.
by mistralaiOct 6, 20261.05M context$0.68/M input tokens$2.09/M output tokens8 providers
- Index 14.2
Reads text, images and files. Tool calling, structured output, reasoning. Served by 18 providers.
by mistralaiApr 29, 2026262K context$1.50/M input tokens$7.50/M output tokens18 providers
- 262K context
Reads text and images. Tool calling, structured output, reasoning. Served by 5 providers.
by mistralaiApr 29, 2026$1.50/M input tokens$7.50/M output tokens5 providers
- Index 11.3
Reads text and images. Tool calling, structured output, reasoning. Served by 15 providers.
by mistralaiMar 16, 2026262K context$0.15/M input tokens$0.60/M output tokens15 providers
- 262K context
Reads text and images. Tool calling, structured output, reasoning. Served by 4 providers.
by mistralaiMar 16, 2026$0.15/M input tokens$0.60/M output tokens4 providers
Voxtral Mini TTS
SpeechTurns text into spoken audio.
by mistralaiMar 1, 2026
Mistral Small 4 questions
How much does the Mistral Small 4 API cost?
$0.40 per million input tokens and $1.40 per million output tokens, with cached input at $0.20. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Mistral Small 4?
32,000 tokens of input, and it can write up to 32,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Mistral Small 4?
3 providers serve it, including Pioneer, Infomaniak and NanoGPT. The lowest input price is $0.15 per million tokens at Pioneer. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Mistral Small 4 support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Mistral Small 4 open source?
Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.
When was Mistral Small 4 released?
Mar 16, 2026, with training data up to Jun 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Mistral Small 4?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
Book Meeting