routing.run

Access 15 routing.run models through Mastra's model router. Authentication is handled automatically using the ROUTING_RUN_API_KEY environment variable.

Learn more in the routing.run documentation.

.env

ROUTING_RUN_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: "routing-run/claude-opus-4-8"
});

// 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 routing.run documentation for details.

Models

15 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
routing-run/claude-opus-4-8	1.0M						$5	$25
routing-run/claude-sonnet-4-6	1.0M						$3	$15
routing-run/deepseek-v4-flash	1.0M						$0.11	$0.22
routing-run/deepseek-v4-pro	1.0M						$0.35	$0.70
routing-run/glm-5.2	200K						$0.80	$2
routing-run/glm-5.2-nitro	200K						$0.80	$2
routing-run/gpt-5.6-luna	1.0M						$0.70	$4
routing-run/gpt-5.6-sol	1.0M						$3	$15
routing-run/gpt-5.6-terra	1.0M						$2	$9
routing-run/kimi-k2.6	200K						$0.28	$1
routing-run/kimi-k2.6-nitro	200K						$0.28	$1
routing-run/kimi-k2.7-code	200K						$0.28	$1
routing-run/kimi-k2.7-code-nitro	200K						$0.28	$1
routing-run/nemotron-3-ultra	131K						$0.10	$0.10
routing-run/qwen3.5-9b	262K						$0.16	$0.48

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.routing.run/v1",
    id: "routing-run/claude-opus-4-8",
    apiKey: process.env.ROUTING_RUN_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
      ? "routing-run/qwen3.5-9b"
      : "routing-run/claude-opus-4-8";
  }
});