Model Oracle AI

Access 15 Model Oracle AI models through Mastra's model router. Authentication is handled automatically using the MODEL_ORACLE_API_KEY environment variable.

Learn more in the Model Oracle AI documentation.

.env

MODEL_ORACLE_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: "model-oracle-ai/auto"
});

// 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 Model Oracle AI documentation for details.

Models

15 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
model-oracle-ai/auto	1.0M						—	—
model-oracle-ai/claude-fable-5	1.0M						—	—
model-oracle-ai/claude-haiku-4.5	200K						—	—
model-oracle-ai/claude-opus-4.8	1.0M						—	—
model-oracle-ai/claude-sonnet-5	1.0M						—	—
model-oracle-ai/deepseek-v4-pro	1.0M						—	—
model-oracle-ai/glm-5.2	1.0M						—	—
model-oracle-ai/gpt-4.1	1.0M						—	—
model-oracle-ai/gpt-4.1-mini	1.0M						—	—
model-oracle-ai/gpt-5	400K						—	—
model-oracle-ai/gpt-5.4	1.1M						—	—
model-oracle-ai/gpt-5.4-mini	400K						—	—
model-oracle-ai/gpt-5.4-nano	400K						—	—
model-oracle-ai/gpt-5.5	1.1M						—	—
model-oracle-ai/o4-mini	200K						—	—

Model availability, capabilities, context windows, and pricing are sourced from models.dev and may change.

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.modeloracle.com/api/v1",
    id: "model-oracle-ai/auto",
    apiKey: process.env.MODEL_ORACLE_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
      ? "model-oracle-ai/o4-mini"
      : "model-oracle-ai/auto";
  }
});