AKI.IO

Access 6 AKI.IO models through Mastra's model router. Authentication is handled automatically using the AKI_IO_API_KEY environment variable.

Learn more in the AKI.IO documentation.

.env

AKI_IO_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: "aki-io/gemma4-26b"
});

// 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 AKI.IO documentation for details.

Models

6 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
aki-io/gemma4-26b	256K						$0.10	$0.50
aki-io/gpt-oss-120b	128K						$0.15	$0.55
aki-io/kimi-k2.7-code-1100b	262K						$0.86	$3
aki-io/minimax-m2.5-230b	197K						$0.25	$1
aki-io/mistral4-119b	262K						$0.20	$0.60
aki-io/qwen3.6-35b	256K						$0.15	$0.50

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://aki.io/v1",
    id: "aki-io/gemma4-26b",
    apiKey: process.env.AKI_IO_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
      ? "aki-io/qwen3.6-35b"
      : "aki-io/gemma4-26b";
  }
});