UnoRouter

Access 23 UnoRouter models through Mastra's model router. Authentication is handled automatically using the UNOROUTER_API_KEY environment variable.

Learn more in the UnoRouter documentation.

.env

UNOROUTER_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: "unorouter/claude-haiku-4-5-20251001"
});

// 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 UnoRouter documentation for details.

Models

23 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
unorouter/claude-haiku-4-5-20251001	200K						$1	$6
unorouter/claude-opus-4-8	1.0M						$0.42	$2
unorouter/claude-sonnet-5	1.0M						$1	$7
unorouter/deepseek-v4-flash	1.0M						$0.06	$0.13
unorouter/deepseek-v4-flash:free	1.0M						—	—
unorouter/deepseek-v4-pro	1.0M						$0.90	$2
unorouter/deepseek-v4-pro:free	1.0M						—	—
unorouter/gemini-3.5-flash	1.0M						$0.19	$1
unorouter/gemma-4-31b-it:free	262K						—	—
unorouter/glm-4.5-flash:free	131K						—	—
unorouter/glm-5.2	1.0M						$2	$5
unorouter/glm-5.2:free	1.0M						—	—
unorouter/gpt-5.2	400K						$1	$8
unorouter/gpt-5.4	1.1M						$2	$11
unorouter/gpt-5.4:free	1.1M						—	—
unorouter/gpt-5.5	1.1M						$0.19	$1
unorouter/gpt-5.5:free	1.1M						—	—
unorouter/kimi-k2.6	262K						$1	$5
unorouter/minimax-m2.7	205K						$0.82	$3
unorouter/minimax-m2.7:free	205K						—	—
unorouter/nemotron-3-ultra-550b-a55b:free	1.0M						—	—
unorouter/qwen3.5-397b-a17b:free	262K						—	—
unorouter/step-3.7-flash:free	256K						—	—

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.unorouter.com/v1",
    id: "unorouter/claude-haiku-4-5-20251001",
    apiKey: process.env.UNOROUTER_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
      ? "unorouter/step-3.7-flash:free"
      : "unorouter/claude-haiku-4-5-20251001";
  }
});