ZenMux

Access 51 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

51 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	200K						$15	$75
zenmux/anthropic/claude-opus-4.1	200K						$15	$75
zenmux/anthropic/claude-opus-4.5	200K						$5	$25
zenmux/anthropic/claude-sonnet-4	1.0M						$3	$15
zenmux/anthropic/claude-sonnet-4.5	1.0M						$3	$15
zenmux/baidu/ernie-5.0-thinking-preview	128K						$0.84	$3
zenmux/deepseek/deepseek-chat	128K						$0.28	$0.42
zenmux/deepseek/deepseek-reasoner	128K						$0.28	$0.42
zenmux/deepseek/deepseek-v3.2	128K						$0.28	$0.43
zenmux/deepseek/deepseek-v3.2-exp	164K						$0.22	$0.33
zenmux/google/gemini-2.5-flash	1.0M						$0.30	$3
zenmux/google/gemini-2.5-flash-lite	1.0M						$0.10	$0.40
zenmux/google/gemini-2.5-pro	1.0M						$1	$10
zenmux/google/gemini-3-flash-preview	1.0M						$0.50	$3
zenmux/google/gemini-3-flash-preview-free	1.0M						—	—
zenmux/google/gemini-3-pro-preview	1.0M						$2	$12
zenmux/inclusionai/ling-1t	128K						$0.56	$2
zenmux/inclusionai/ring-1t	128K						$0.56	$2
zenmux/kuaishou/kat-coder-pro-v1	256K						—	—
zenmux/kuaishou/kat-coder-pro-v1-free	256K						—	—
zenmux/minimax/minimax-m2	205K						$0.30	$1
zenmux/minimax/minimax-m2.1	205K						$0.30	$1
zenmux/moonshotai/kimi-k2-0905	262K						$0.60	$3
zenmux/moonshotai/kimi-k2-thinking	262K						$0.60	$3
zenmux/moonshotai/kimi-k2-thinking-turbo	262K						$1	$8
zenmux/openai/gpt-5	400K						$1	$10
zenmux/openai/gpt-5-codex	400K						$1	$10
zenmux/openai/gpt-5.1	400K						$1	$10
zenmux/openai/gpt-5.1-chat	128K						$1	$10
zenmux/openai/gpt-5.1-codex	400K						$1	$10
zenmux/openai/gpt-5.1-codex-mini	400K						$0.25	$2
zenmux/openai/gpt-5.2	400K						$2	$14
zenmux/qwen/qwen3-coder-plus	1.0M						$1	$5
zenmux/stepfun/step-3	66K						$0.21	$0.57
zenmux/volcengine/doubao-seed-1.8	256K						$0.11	$0.28
zenmux/volcengine/doubao-seed-code	256K						$0.17	$1
zenmux/x-ai/grok-4	256K						$3	$15
zenmux/x-ai/grok-4-fast	2.0M						$0.20	$0.50
zenmux/x-ai/grok-4.1-fast	2.0M						$0.20	$0.50
zenmux/x-ai/grok-4.1-fast-non-reasoning	2.0M						$0.20	$0.50
zenmux/x-ai/grok-code-fast-1	256K						$0.20	$2
zenmux/xiaomi/mimo-v2-flash	262K						—	—
zenmux/xiaomi/mimo-v2-flash-free	262K						—	—
zenmux/z-ai/glm-4.5	128K						$0.35	$2
zenmux/z-ai/glm-4.5-air	128K						$0.11	$0.56
zenmux/z-ai/glm-4.6	200K						$0.35	$2
zenmux/z-ai/glm-4.6v	200K						$0.14	$0.42
zenmux/z-ai/glm-4.6v-flash	200K						—	—
zenmux/z-ai/glm-4.6v-flash-free	200K						—	—
zenmux/z-ai/glm-4.7	200K						$0.28	$1

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-4.7"
      : "zenmux/anthropic/claude-haiku-4.5";
  }
});