Anthropic

Use Anthropic's Claude models as your agent's LLM provider.

Installation

npm install @ai-sdk/anthropic

Quick Setup

import { anthropic } from "@ai-sdk/anthropic";
import { Agent, VoltAgent, createTool } from "@voltagent/core";
import { honoServer } from "@voltagent/server-hono";
import { z } from "zod";

const weatherTool = createTool({
  name: "get_weather",
  description: "Get weather for a location",
  parameters: z.object({
    location: z.string(),
  }),
  execute: async ({ location }) => {
    return { location, temperature: 22 };
  },
});

const agent = new Agent({
  name: "Claude Agent",
  instructions: "A helpful assistant powered by Claude",
  model: anthropic("claude-sonnet-4-20250514"),
  tools: [weatherTool],
});

new VoltAgent({
  agents: { agent },
  server: honoServer({ port: 3141 }),
});

Environment Variables

ANTHROPIC_API_KEY=your-api-key

Available Models

Model	Description
claude-opus-4-1	Most capable model
claude-sonnet-4-20250514	Balanced performance
claude-3-5-haiku-20241022	Fast and efficient

Full Example

See the complete example: with-anthropic on GitHub