Morph

Access 3 Morph models through Mastra's model router. Authentication is handled automatically using the MORPH_API_KEY environment variable.

Learn more in the Morph documentation.

MORPH_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: "morph/auto"
});

// 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);
}

:::info

Mastra uses the OpenAI-compatible /chat/completions endpoint. Some provider-specific features may not be available. Check the Morph documentation for details.

:::

Models

<ProviderModelsTable models={[ { "model": "morph/auto", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": false, "reasoning": false, "contextWindow": 32000, "maxOutput": 32000, "inputCost": 0.85, "outputCost": 1.55 }, { "model": "morph/morph-v3-fast", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": false, "reasoning": false, "contextWindow": 16000, "maxOutput": 16000, "inputCost": 0.8, "outputCost": 1.2 }, { "model": "morph/morph-v3-large", "imageInput": false, "audioInput": false, "videoInput": false, "toolUsage": false, "reasoning": false, "contextWindow": 32000, "maxOutput": 32000, "inputCost": 0.9, "outputCost": 1.9 } ]} />

Advanced configuration

Custom headers

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.morphllm.com/v1",
    id: "morph/auto",
    apiKey: process.env.MORPH_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
      ? "morph/morph-v3-large"
      : "morph/auto";
  }
});