Mistral

Access 26 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/agent";

const agent = new Agent({
  id: "my-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

<ProviderModelsTable models={[ { "model": "mistral/codestral-latest", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 256000, "maxOutput": 4096, "inputCost": 0.3, "outputCost": 0.9 }, { "model": "mistral/devstral-2512", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 262144, "maxOutput": 262144, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/devstral-medium-2507", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/devstral-medium-latest", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 262144, "maxOutput": 262144, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/devstral-small-2505", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.1, "outputCost": 0.3 }, { "model": "mistral/devstral-small-2507", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.1, "outputCost": 0.3 }, { "model": "mistral/labs-devstral-small-2512", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 256000, "maxOutput": 256000, "inputCost": null, "outputCost": null }, { "model": "mistral/magistral-medium-latest", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": true, "contextWindow": 128000, "maxOutput": 16384, "inputCost": 2, "outputCost": 5 }, { "model": "mistral/magistral-small", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": true, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.5, "outputCost": 1.5 }, { "model": "mistral/ministral-3b-latest", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.04, "outputCost": 0.04 }, { "model": "mistral/ministral-8b-latest", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.1, "outputCost": 0.1 }, { "model": "mistral/mistral-embed", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": false, "reasoning": false, "contextWindow": 8000, "maxOutput": 3072, "inputCost": 0.1, "outputCost": null }, { "model": "mistral/mistral-large-2411", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 131072, "maxOutput": 16384, "inputCost": 2, "outputCost": 6 }, { "model": "mistral/mistral-large-2512", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 262144, "maxOutput": 262144, "inputCost": 0.5, "outputCost": 1.5 }, { "model": "mistral/mistral-large-latest", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 262144, "maxOutput": 262144, "inputCost": 0.5, "outputCost": 1.5 }, { "model": "mistral/mistral-medium-2505", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 131072, "maxOutput": 131072, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/mistral-medium-2508", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 262144, "maxOutput": 262144, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/mistral-medium-latest", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 16384, "inputCost": 0.4, "outputCost": 2 }, { "model": "mistral/mistral-nemo", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.15, "outputCost": 0.15 }, { "model": "mistral/mistral-small-2506", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 16384, "inputCost": 0.1, "outputCost": 0.3 }, { "model": "mistral/mistral-small-latest", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 16384, "inputCost": 0.1, "outputCost": 0.3 }, { "model": "mistral/open-mistral-7b", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 8000, "maxOutput": 8000, "inputCost": 0.25, "outputCost": 0.25 }, { "model": "mistral/open-mixtral-8x22b", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 64000, "maxOutput": 64000, "inputCost": 2, "outputCost": 6 }, { "model": "mistral/open-mixtral-8x7b", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 32000, "maxOutput": 32000, "inputCost": 0.7, "outputCost": 0.7 }, { "model": "mistral/pixtral-12b", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 0.15, "outputCost": 0.15 }, { "model": "mistral/pixtral-large-latest", "imageInput": true, "audioInput": false, "videoInput": false, "toolUsage": true, "reasoning": false, "contextWindow": 128000, "maxOutput": 128000, "inputCost": 2, "outputCost": 6 } ]} />

Advanced configuration

Custom headers

const agent = new Agent({
  id: "custom-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({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.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.