Firmware

Access 20 Firmware models through Mastra's model router. Authentication is handled automatically using the FIRMWARE_API_KEY environment variable.

Learn more in the Firmware documentation.

FIRMWARE_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: "firmware/cerebras-gpt-oss-120b"
});

// 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 Firmware documentation for details.

Models

20 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
firmware/cerebras-gpt-oss-120b	131K						—	—
firmware/cerebras-zai-glm-4.7	131K						—	—
firmware/claude-haiku-4-5	200K						—	—
firmware/claude-opus-4-5	200K						—	—
firmware/claude-sonnet-4-5	200K						—	—
firmware/deepseek-chat	128K						—	—
firmware/deepseek-coder	16K						—	—
firmware/deepseek-reasoner	128K						—	—
firmware/gemini-2.5-flash	1.0M						—	—
firmware/gemini-2.5-pro	1.0M						—	—
firmware/gemini-3-flash-preview	1.0M						—	—
firmware/gemini-3-pro-preview	1.0M						—	—
firmware/gpt-4o	128K						—	—
firmware/gpt-5	400K						—	—
firmware/gpt-5-mini	400K						—	—
firmware/gpt-5-nano	400K						—	—
firmware/gpt-5.2	400K						—	—
firmware/grok-4-fast-non-reasoning	2.0M						—	—
firmware/grok-4-fast-reasoning	2.0M						—	—
firmware/grok-code-fast-1	256K						—	—

Advanced Configuration

Custom Headers

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://app.firmware.ai/api/v1",
    id: "firmware/cerebras-gpt-oss-120b",
    apiKey: process.env.FIRMWARE_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
      ? "firmware/grok-code-fast-1"
      : "firmware/cerebras-gpt-oss-120b";
  }
});