CrossModel

Access 37 CrossModel models through Mastra's model router. Authentication is handled automatically using the CROSSMODEL_API_KEY environment variable.

Learn more in the CrossModel documentation.

.env

CROSSMODEL_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: "crossmodel/anthropic/claude-fable-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 CrossModel documentation for details.

Models

37 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
crossmodel/anthropic/claude-fable-5	1.0M						$10	$50
crossmodel/anthropic/claude-haiku-4-5	200K						$1	$5
crossmodel/anthropic/claude-opus-4-7	1.0M						$5	$25
crossmodel/anthropic/claude-opus-4-8	1.0M						$5	$25
crossmodel/anthropic/claude-sonnet-4-6	1.0M						$3	$15
crossmodel/anthropic/claude-sonnet-5	1.0M						$2	$10
crossmodel/deepseek/deepseek-v4-flash	1.0M						$0.16	$0.32
crossmodel/deepseek/deepseek-v4-pro	1.0M						$0.47	$0.94
crossmodel/gemini/gemini-2.5-flash	1.0M						$0.30	$3
crossmodel/gemini/gemini-2.5-flash-lite	1.0M						$0.10	$0.40
crossmodel/gemini/gemini-2.5-pro	1.0M						$1	$10
crossmodel/gemini/gemini-3-flash-preview	1.0M						$0.50	$3
crossmodel/gemini/gemini-3.1-pro-preview	1.0M						$2	$12
crossmodel/gemini/gemini-3.5-flash	1.0M						$2	$9
crossmodel/minimax/minimax-m2.7	205K						$0.33	$1
crossmodel/minimax/minimax-m3	1.0M						$0.33	$1
crossmodel/moonshot/kimi-k2.5	262K						$0.62	$3
crossmodel/moonshot/kimi-k2.6	262K						$1	$4
crossmodel/moonshot/kimi-k2.7-code	262K						$1	$4
crossmodel/openai/gpt-4o-mini	128K						$0.15	$0.60
crossmodel/openai/gpt-5.4	1.1M						$3	$15
crossmodel/openai/gpt-5.4-mini	400K						$0.75	$5
crossmodel/openai/gpt-5.4-nano	400K						$0.20	$1
crossmodel/openai/gpt-5.5	1.1M						$5	$30
crossmodel/openai/gpt-5.5-pro	1.1M						$30	$180
crossmodel/qwen/qwen3.6-flash	1.0M						$0.19	$1
crossmodel/qwen/qwen3.6-plus	1.0M						$0.32	$2
crossmodel/qwen/qwen3.7-max	1.0M						$2	$6
crossmodel/qwen/qwen3.7-plus	1.0M						$0.32	$1
crossmodel/tencent/hy3-preview	256K						$0.19	$0.63
crossmodel/xiaomi/mimo-v2.5	1.0M						$0.16	$0.32
crossmodel/xiaomi/mimo-v2.5-pro	1.0M						$0.47	$0.94
crossmodel/z-ai/glm-4.7	200K						$0.47	$2
crossmodel/z-ai/glm-5	200K						$0.60	$3
crossmodel/z-ai/glm-5-turbo	200K						$0.90	$4
crossmodel/z-ai/glm-5.1	200K						$1	$4
crossmodel/z-ai/glm-5.2	1.0M						$1	$4

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.crossmodel.ai/v1",
    id: "crossmodel/anthropic/claude-fable-5",
    apiKey: process.env.CROSSMODEL_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
      ? "crossmodel/z-ai/glm-5.2"
      : "crossmodel/anthropic/claude-fable-5";
  }
});