Vercel AI Gateway Now Supports Claude Code via Anthropic-compatible API

Vercel has announced a new integration that allows developers to route Claude Code requests through the Vercel AI Gateway using an Anthropic-compatible API endpoint. This update is significant for teams looking to centralize their AI model usage, manage costs more effectively, and gain better observability into their AI operations.

What Changed Technically

Vercel's AI Gateway now supports Claude Code, a powerful code generation tool from Anthropic. Here’s what this means in practice:

• Centralized Usage: By routing requests through Vercel AI Gateway, you can centralize how your team uses Claude Code. This makes it easier to manage and monitor usage across different projects.
• Cost Management: Centralizing requests also helps in managing and optimizing costs associated with using Claude Code.
• Observability: You get detailed traces and logs for each request, which is crucial for debugging and performance tuning.
• Failover Support: The gateway provides failover capabilities, ensuring that your application remains resilient even if one provider experiences issues.

How to Set It Up

To start using Claude Code through Vercel AI Gateway, you need to configure a few environment variables. Here’s a step-by-step guide:

1. Log Out of Claude Code:

   claude /logout
   

2. Set Environment Variables:

   • ANTHROPIC_BASE_URL: Set this to the Vercel AI Gateway endpoint.
   • ANTHROPIC_AUTH_TOKEN: Use your Vercel AI Gateway API key.
   • ANTHROPIC_API_KEY: Set this to an empty string to ensure Claude Code uses the ANTHROPIC_AUTH_TOKEN.

   export ANTHROPIC_BASE_URL="https://ai-gateway.vercel.sh"
   export ANTHROPIC_AUTH_TOKEN="your-ai-gateway-api-key"
   export ANTHROPIC_API_KEY=""
   

3. Start Claude Code:

   claude
   

Implementation Details

• Environment Variables:

  • ANTHROPIC_API_KEY must be set to an empty string. This is a crucial step because Claude Code checks this variable first. If it's non-empty, Claude Code will use that key instead of the ANTHROPIC_AUTH_TOKEN.

• Routing Mechanism:

  • When you make a request using Claude Code, it will now route through the Vercel AI Gateway. The gateway then forwards the request to Anthropic's API.
  • This setup allows for seamless integration without requiring significant changes to your existing codebase.

Why It Matters

• Simplified Management: Centralizing requests makes it easier to manage and monitor usage, which is particularly useful for larger teams or organizations with multiple projects.
• Cost Optimization: By centralizing requests, you can better track and optimize costs associated with using Claude Code.
• Enhanced Observability: Detailed traces and logs provide valuable insights into how your AI models are performing, helping you identify and resolve issues more efficiently.
• Resilience: The failover capabilities ensure that your application remains robust and reliable, even in the face of provider outages.

Additional Resources

For more detailed information, check out the Claude Code documentation.

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