# Claude models for ADK agents

Supported in ADKJava v0.2.0

You can integrate Anthropic's Claude models directly using an Anthropic API key or from an Agent Platform backend into your Java ADK applications by using the ADK's `Claude` wrapper class. You can also access Anthropic models through Google Cloud Agent Platform services. For more information, see the [Third-Party Models on Agent Platform](/agents/models/agent-platform/#anthropic-claude) section. You can also use Anthropic models through the [LiteLLM](/agents/models/litellm/) library for Python.

## Get started

The following code examples show a basic implementation for using Anthropic models in your agents:

```java
public static LlmAgent createAgent() {

  AnthropicClient anthropicClient = AnthropicOkHttpClient.builder()
      .apiKey("ANTHROPIC_API_KEY")
      .build();

  Claude claudeModel = new Claude(
      "claude-sonnet-4-6", anthropicClient
  );

  return LlmAgent.builder()
      .name("claude_direct_agent")
      .model(claudeModel)
      .instruction("You are a helpful AI assistant powered by Anthropic Claude.")
      .build();
}
```

## Prerequisites

1. **Dependencies:**

   - **Anthropic SDK Classes (Transitive):** The Java ADK's `com.google.adk.models.Claude` wrapper relies on classes from Anthropic's official Java SDK. These are typically included as *transitive dependencies*. For more information, see the [Anthropic Java SDK](https://github.com/anthropics/anthropic-sdk-java).

1. **Anthropic API Key:**

   - Obtain an API key from Anthropic. Securely manage this key using a secret manager.

## Example implementation

Instantiate `com.google.adk.models.Claude`, providing the desired Claude model name and an `AnthropicOkHttpClient` configured with your API key. Then, pass the `Claude` instance to your `LlmAgent`, as shown in the following example:

```java
import com.anthropic.client.AnthropicClient;
import com.google.adk.agents.LlmAgent;
import com.google.adk.models.Claude;
import com.anthropic.client.okhttp.AnthropicOkHttpClient; // From Anthropic's SDK

public class DirectAnthropicAgent {

  private static final String CLAUDE_MODEL_ID = "claude-sonnet-4-6"; // Or your preferred Claude model

  public static LlmAgent createAgent() {

    // It's recommended to load sensitive keys from a secure config
    AnthropicClient anthropicClient = AnthropicOkHttpClient.builder()
        .apiKey("ANTHROPIC_API_KEY")
        .build();

    Claude claudeModel = new Claude(
        CLAUDE_MODEL_ID,
        anthropicClient
    );

    return LlmAgent.builder()
        .name("claude_direct_agent")
        .model(claudeModel)
        .instruction("You are a helpful AI assistant powered by Anthropic Claude.")
        // ... other LlmAgent configurations
        .build();
  }

  public static void main(String[] args) {
    try {
      LlmAgent agent = createAgent();
      System.out.println("Successfully created direct Anthropic agent: " + agent.name());
    } catch (IllegalStateException e) {
      System.err.println("Error creating agent: " + e.getMessage());
    }
  }
}
```