InferX

Access 6 InferX models through Mastra's model router. Authentication is handled automatically using the INFERX_API_KEY environment variable.

Learn more in the InferX documentation.

.env

INFERX_API_KEY=your-api-key

src/mastra/agents/my-agent.ts

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

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "inferx/google/gemma-4-31b-it-fp8"
});

// 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 InferX documentation for details.

Models

6 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
inferx/google/gemma-4-31b-it-fp8	262K						—	—
inferx/qwen/qwen3-coder-next-fp8	256K						—	—
inferx/qwen/qwen3-coder-next-fp8-1m	1.0M						—	—
inferx/qwen/qwen3.5-122b-a10b-nvfp4	256K						—	—
inferx/qwen/qwen3.6-27b-fp8	262K						—	—
inferx/qwen/qwen3.6-35b-a3b-fp8	262K						—	—

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://model.inferx.net/v1",
    id: "inferx/google/gemma-4-31b-it-fp8",
    apiKey: process.env.INFERX_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic model selection

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === "complex";
    return useAdvanced
      ? "inferx/qwen/qwen3.6-35b-a3b-fp8"
      : "inferx/google/gemma-4-31b-it-fp8";
  }
});