ZenMux

Access 18 ZenMux models through Mastra's model router. Authentication is handled automatically using the ZENMUX_API_KEY environment variable.

Learn more in the ZenMux documentation.

ZENMUX_API_KEY=your-api-key

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

const agent = new Agent({
  name: "my-agent",
  instructions: "You are a helpful assistant",
  model: "zenmux/anthropic/claude-haiku-4.5"
});

// 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 ZenMux documentation for details.

Models

18 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
zenmux/anthropic/claude-haiku-4.5	200K						$1	$5
zenmux/anthropic/claude-opus-4.1	200K						$15	$75
zenmux/anthropic/claude-sonnet-4.5	1.0M						$3	$15
zenmux/deepseek/deepseek-chat	128K						$0.56	$2
zenmux/google/gemini-2.5-pro	1.0M						$1	$10
zenmux/inclusionai/lint-1t	128K						$0.56	$2
zenmux/inclusionai/ring-1t	128K						$0.56	$2
zenmux/kuaishou/kat-coder-pro-v1	256K						$0.60	$2
zenmux/moonshotai/kimi-k2-0905	262K						$0.60	$3
zenmux/openai/gpt-5	400K						$1	$10
zenmux/openai/gpt-5-codex	400K						$1	$10
zenmux/qwen/qwen3-coder-plus	1.0M						$1	$5
zenmux/x-ai/grok-4	256K						$3	$15
zenmux/x-ai/grok-4-fast	2.0M						$0.20	$0.50
zenmux/x-ai/grok-4-fast-non-reasoning	2.0M						$0.20	$0.50
zenmux/x-ai/grok-code-fast-1	256K						$0.20	$2
zenmux/z-ai/glm-4.5-air	128K						$0.11	$0.56
zenmux/z-ai/glm-4.6	200K						$0.35	$2

Advanced Configuration

Custom Headers

const agent = new Agent({
  name: "custom-agent",
  model: {
    url: "https://zenmux.ai/api/v1",
    id: "zenmux/anthropic/claude-haiku-4.5",
    apiKey: process.env.ZENMUX_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic Model Selection

const agent = new Agent({
  name: "dynamic-agent",
  model: ({ runtimeContext }) => {
    const useAdvanced = runtimeContext.task === "complex";
    return useAdvanced
      ? "zenmux/z-ai/glm-4.6"
      : "zenmux/anthropic/claude-haiku-4.5";
  }
});