Mistral

Access 19 Mistral models through Mastra's model router. Authentication is handled automatically using the MISTRAL_API_KEY environment variable.

Learn more in the Mistral documentation.

MISTRAL_API_KEY=your-api-key

import { Agent } from "@mastra/core";

const agent = new Agent({
  name: "my-agent",
  instructions: "You are a helpful assistant",
  model: "mistral/codestral-latest"
});

// Generate a response
const response = await agent.generate("Hello!");

// Stream a response
const stream = await agent.stream("Tell me a story");
for await (const chunk of stream) {
  console.log(chunk);
}

Models

19 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
mistral/codestral-latest	256K						$0.30	$0.90
mistral/devstral-medium-2507	128K						$0.40	$2
mistral/devstral-small-2505	128K						$0.10	$0.30
mistral/devstral-small-2507	128K						$0.10	$0.30
mistral/magistral-medium-latest	128K						$2	$5
mistral/magistral-small	128K						$0.50	$2
mistral/ministral-3b-latest	128K						$0.04	$0.04
mistral/ministral-8b-latest	128K						$0.10	$0.10
mistral/mistral-large-latest	131K						$2	$6
mistral/mistral-medium-2505	131K						$0.40	$2
mistral/mistral-medium-2508	262K						$0.40	$2
mistral/mistral-medium-latest	128K						$0.40	$2
mistral/mistral-nemo	128K						$0.15	$0.15
mistral/mistral-small-latest	128K						$0.10	$0.30
mistral/open-mistral-7b	8K						$0.25	$0.25
mistral/open-mixtral-8x22b	64K						$2	$6
mistral/open-mixtral-8x7b	32K						$0.70	$0.70
mistral/pixtral-12b	128K						$0.15	$0.15
mistral/pixtral-large-latest	128K						$2	$6

Advanced Configuration

Custom Headers

const agent = new Agent({
  name: "custom-agent",
  model: {
    url: "https://api.mistral.ai/v1",
    id: "mistral/codestral-latest",
    apiKey: process.env.MISTRAL_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic Model Selection

const agent = new Agent({
  name: "dynamic-agent",
  model: ({ runtimeContext }) => {
    const useAdvanced = runtimeContext.task === "complex";
    return useAdvanced
      ? "mistral/pixtral-large-latest"
      : "mistral/codestral-latest";
  }
});

Direct Provider Installation

This provider can also be installed directly as a standalone package, which can be used instead of the Mastra model router string. View the package documentation for more details.

npm install @ai-sdk/mistral

For detailed provider-specific documentation, see the AI SDK Mistral provider docs.