npm install ai

import { createOpenAI } from '@ai-sdk/openai';

const gaia = createOpenAI({
  baseURL: 'http://localhost:3000/api/v1',
  apiKey: 'gaia_your_api_key'
});

import { streamText } from 'ai';

export async function POST(req: Request) {
  const { messages } = await req.json();

  const result = await streamText({
    model: gaia('proj_abc123'), // your project ID
    messages
  });

  return result.toDataStreamResponse();
}

'use client';
import { useChat } from 'ai/react';

export default function Chat() {
  const { messages, input, handleInputChange, handleSubmit } = useChat({
    api: '/api/chat'
  });

  return (
    <div>
      {messages.map(m => (
        <div key={m.id}>
          <strong>{m.role}:</strong> {m.content}
        </div>
      ))}
      
      <form onSubmit={handleSubmit}>
        <input value={input} onChange={handleInputChange} />
        <button type="submit">Send</button>
      </form>
    </div>
  );
}