ai-sdk-claude-agent

AI SDK provider that wraps the Claude Agent SDK, exposing it as a standard LanguageModelV2.

Install

bun install ai-sdk-claude-agent @anthropic-ai/claude-agent-sdk

Usage

import { createClaudeAgent } from "ai-sdk-claude-agent";
import { generateText, streamText } from "ai";

const provider = createClaudeAgent();

// Generate text
const { text } = await generateText({
  model: provider("claude-sonnet-4-5-20250929"),
  prompt: "Explain how async generators work in JavaScript.",
});

// Stream text
const result = streamText({
  model: provider("claude-sonnet-4-5-20250929"),
  prompt: "Write a haiku about TypeScript.",
});

for await (const chunk of result.textStream) {
  process.stdout.write(chunk);
}

How it works

• Calls the Agent SDK's query() with maxTurns: 1 so the AI SDK controls the agentic loop
• All built-in Agent SDK tools are disabled (allowedTools: [])
• AI SDK tool definitions are passed through as in-process MCP tools via createSdkMcpServer()
• Streaming uses includePartialMessages: true to get raw Anthropic events, mapped to LanguageModelV2StreamPart

Provider options

const provider = createClaudeAgent({
  name: "my-agent", // provider display name (default: "claude-agent")
  cwd: "/path/to/dir", // working directory for the agent
});

Available models

| Model | ID | | ----------------- | ---------------------------- | | Claude Sonnet 4.5 | claude-sonnet-4-5-20250929 | | Claude Opus 4.5 | claude-opus-4-5-20251101 | | Claude Haiku 4.5 | claude-haiku-4-5-20251001 |

Any model ID supported by the Agent SDK can be used.

Using with opencode

The Claude Agent SDK requires a Claude Code & Claude Account or Anthropic API key.

Install the Claude Code CLI before you start.

Add to your opencode.json:

{
  "provider": {
    "claude-agent": {
      "npm": "ai-sdk-claude-agent",
      "name": "Claude Agent SDK",
      "models": {
        "claude-sonnet-4-5-20250929": {
          "name": "Claude Sonnet 4.5 (Agent SDK)",
          "tool_call": true,
          "reasoning": true,
          "limit": { "context": 200000, "output": 64000 }
        }
      }
    }
  }
}

License

MIT