GitHub Models

Access 55 GitHub Models models through Mastra's model router. Authentication is handled automatically using the GITHUB_TOKEN environment variable.

Learn more in the GitHub Models documentation.

GITHUB_TOKEN=your-api-key

import { Agent } from "@mastra/core";

const agent = new Agent({
  name: "my-agent",
  instructions: "You are a helpful assistant",
  model: "github-models/ai21-labs/ai21-jamba-1.5-large"
});

// 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 GitHub Models documentation for details.

ModelsDirect link to Models

55 available models
Model	Context	Input $/1M	Output $/1M
`github-models/ai21-labs/ai21-jamba-1.5-large`	256K	—	—
`github-models/ai21-labs/ai21-jamba-1.5-mini`	256K	—	—
`github-models/cohere/cohere-command-a`	128K	—	—
`github-models/cohere/cohere-command-r`	128K	—	—
`github-models/cohere/cohere-command-r-08-2024`	128K	—	—
`github-models/cohere/cohere-command-r-plus`	128K	—	—
`github-models/cohere/cohere-command-r-plus-08-2024`	128K	—	—
`github-models/core42/jais-30b-chat`	8K	—	—
`github-models/deepseek/deepseek-r1`	66K	—	—
`github-models/deepseek/deepseek-r1-0528`	66K	—	—
`github-models/deepseek/deepseek-v3-0324`	128K	—	—
`github-models/meta/llama-3.2-11b-vision-instruct`	128K	—	—
`github-models/meta/llama-3.2-90b-vision-instruct`	128K	—	—
`github-models/meta/llama-3.3-70b-instruct`	128K	—	—
`github-models/meta/llama-4-maverick-17b-128e-instruct-fp8`	128K	—	—
`github-models/meta/llama-4-scout-17b-16e-instruct`	128K	—	—
`github-models/meta/meta-llama-3-70b-instruct`	8K	—	—
`github-models/meta/meta-llama-3-8b-instruct`	8K	—	—
`github-models/meta/meta-llama-3.1-405b-instruct`	128K	—	—
`github-models/meta/meta-llama-3.1-70b-instruct`	128K	—	—
`github-models/meta/meta-llama-3.1-8b-instruct`	128K	—	—
`github-models/microsoft/mai-ds-r1`	66K	—	—
`github-models/microsoft/phi-3-medium-128k-instruct`	128K	—	—
`github-models/microsoft/phi-3-medium-4k-instruct`	4K	—	—
`github-models/microsoft/phi-3-mini-128k-instruct`	128K	—	—
`github-models/microsoft/phi-3-mini-4k-instruct`	4K	—	—
`github-models/microsoft/phi-3-small-128k-instruct`	128K	—	—
`github-models/microsoft/phi-3-small-8k-instruct`	8K	—	—
`github-models/microsoft/phi-3.5-mini-instruct`	128K	—	—
`github-models/microsoft/phi-3.5-moe-instruct`	128K	—	—
`github-models/microsoft/phi-3.5-vision-instruct`	128K	—	—
`github-models/microsoft/phi-4`	16K	—	—
`github-models/microsoft/phi-4-mini-instruct`	128K	—	—
`github-models/microsoft/phi-4-mini-reasoning`	128K	—	—
`github-models/microsoft/phi-4-multimodal-instruct`	128K	—	—
`github-models/microsoft/phi-4-reasoning`	128K	—	—
`github-models/mistral-ai/codestral-2501`	32K	—	—
`github-models/mistral-ai/ministral-3b`	128K	—	—
`github-models/mistral-ai/mistral-large-2411`	128K	—	—
`github-models/mistral-ai/mistral-medium-2505`	128K	—	—
`github-models/mistral-ai/mistral-nemo`	128K	—	—
`github-models/mistral-ai/mistral-small-2503`	128K	—	—
`github-models/openai/gpt-4.1`	128K	—	—
`github-models/openai/gpt-4.1-mini`	128K	—	—
`github-models/openai/gpt-4.1-nano`	128K	—	—
`github-models/openai/gpt-4o`	128K	—	—
`github-models/openai/gpt-4o-mini`	128K	—	—
`github-models/openai/o1`	200K	—	—
`github-models/openai/o1-mini`	128K	—	—
`github-models/openai/o1-preview`	128K	—	—
`github-models/openai/o3`	200K	—	—
`github-models/openai/o3-mini`	200K	—	—
`github-models/openai/o4-mini`	200K	—	—
`github-models/xai/grok-3`	128K	—	—
`github-models/xai/grok-3-mini`	128K	—	—

Advanced ConfigurationDirect link to Advanced Configuration

Custom HeadersDirect link to Custom Headers

const agent = new Agent({
  name: "custom-agent",
  model: {
    url: "https://models.github.ai/inference",
    id: "github-models/ai21-labs/ai21-jamba-1.5-large",
    apiKey: process.env.GITHUB_TOKEN,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic Model SelectionDirect link to Dynamic Model Selection

const agent = new Agent({
  name: "dynamic-agent",
  model: ({ runtimeContext }) => {
    const useAdvanced = runtimeContext.task === "complex";
    return useAdvanced
      ? "github-models/xai/grok-3-mini"
      : "github-models/ai21-labs/ai21-jamba-1.5-large";
  }
});