Arcee

Access 7 Arcee models through Mastra's model router. Authentication is handled automatically using the ARCEE_API_KEY environment variable.

Learn more in the Arcee documentation.

.env

ARCEE_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: "arcee/deepseek/deepseek-v4-flash-latest"
});

// 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);
}

note

Mastra uses the OpenAI-compatible /chat/completions endpoint. Some provider-specific features may not be available. Check the Arcee documentation for details.

Models

7 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
arcee/deepseek/deepseek-v4-flash-latest	1.0M						$0.14	$0.28
arcee/deepseek/deepseek-v4-pro	512K						$2	$3
arcee/deepseek/deepseek-v4-pro-0813	1.0M						$1	$4
arcee/moonshotai/kimi-k3	1.0M						$3	$15
arcee/thinkingmachines/inkling-small	262K						$0.50	$1
arcee/trinity-large-thinking	262K						$0.25	$0.80
arcee/zai-org/glm-5.2	262K						$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.arcee.ai/api/v1",
    id: "arcee/deepseek/deepseek-v4-flash-latest",
    apiKey: process.env.ARCEE_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
      ? "arcee/zai-org/glm-5.2"
      : "arcee/deepseek/deepseek-v4-flash-latest";
  }
});