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. It combines strong reasoning from...

InputImageText
OutputText
Input / Outputclub$0.159 / $0.636per 1M tokens · USD
Context window262.1Ktoken
Maximum output209.7Ktoken

Pricing

Current model usage rates. Choose your plan to see its published prices.

Pricing
UsagePricing
InputUS$0.159/ 1M token
Cache readUS$0.0159/ 1M token
OutputUS$0.636/ 1M token

Membership and model usage are billed separately. Compare plans

Capabilities

Input
ImageText
Output
Text
Context window
262,144 token
Maximum output
209,715 token
Reasoning
high · none

Providers

Model supply available through Vecbase.

Via OpenRouter

Access is subject to your account’s permissions and model availability.

Frequently asked questions

What is Mistral Small 4, and who develops it?

Mistral Small 4 is a model from mistralai. Its model ID on Vecbase is 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. It combines strong reasoning from...

How much does Mistral Small 4 cost on Vecbase?

For Mistral Small 4, the Club plan lists USD 0.159 per 1 million input tokens and USD 0.636 per 1 million output tokens, as of 10/22/2026, 8:19:29 PM UTC. See the pricing table for cache rates, input-length tiers and other usage types. Membership fees are separate.

How many tokens fit in Mistral Small 4’s context window?

Mistral Small 4 has a context window of 262,144 tokens. Input and output must fit within the limits of the API you use.

What is the maximum output length for Mistral Small 4?

Mistral Small 4 can generate up to 209,715 tokens per response. Your API or request settings may set a lower limit.

Can Mistral Small 4 call tools in an agent workflow?

Yes. Mistral Small 4 supports tool calling. Your application provides the tool definitions and runs the tools the model requests.

Does Mistral Small 4 support structured outputs?

Yes. Mistral Small 4 supports structured output. Set the required format in your API request and check the returned data before using it.

Which input and output formats does Mistral Small 4 support?

Mistral Small 4 accepts Image and Text and produces Text.

Which providers make Mistral Small 4 available through Vecbase?

Vecbase offers Mistral Small 4 through OpenRouter. Availability may vary by provider.

Which model ID should an agent use to request Mistral Small 4?

Use mistralai/mistral-small-2603 as the model identifier for Mistral Small 4. See Vecbase’s API documentation for authentication, required inputs and supported request formats.

Which reasoning settings are listed for Mistral Small 4?

Mistral Small 4 supports these reasoning levels: high and none. Available options depend on your API.

What does an agent need to access Mistral Small 4 through Vecbase?

To use Mistral Small 4, you need an authenticated account with the required permissions, sufficient balance and the relevant capability enabled. See the documentation for setup.

Is a release date available for Mistral Small 4?

We do not yet have a confirmed release date for Mistral Small 4.

Which models can I compare with Mistral Small 4 on Vecbase?

You can compare Mistral Small 4 with Codestral 2508 (mistralai/codestral-2508), Devstral 2 2512 (mistralai/devstral-2512), and Ministral 3 14B 2512 (mistralai/ministral-14b-2512). Check their capabilities and prices to find the best fit for your task.