Vercel AI SDK

The Vercel AI SDK works against ai& through the @ai-sdk/openai provider with a custom base URL.

Setup

npm install ai @ai-sdk/openai

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

export const aiand = createOpenAI({
  baseURL: "https://api.aiand.com/v1",
  apiKey: process.env.AIAND_API_KEY,
});

Generate text

import { generateText } from "ai";
import { aiand } from "./client";

const { text } = await generateText({
  model: aiand("openai/gpt-oss-120b"),
  prompt: "Tell me a haiku about Tokyo.",
});

console.log(text);

Stream to the browser (Next.js App Router)

import { streamText } from "ai";
import { aiand } from "@/lib/aiand";

export async function POST(req: Request) {
  const { messages } = await req.json();
  const result = streamText({
    model: aiand("openai/gpt-oss-120b"),
    messages,
  });
  return result.toDataStreamResponse();
}

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

export default function Page() {
  const { messages, input, handleInputChange, handleSubmit } = useChat();
  return (
    <form onSubmit={handleSubmit}>
      {messages.map((m) => (
        <div key={m.id}>{m.role}: {m.content}</div>
      ))}
      <input value={input} onChange={handleInputChange} />
    </form>
  );
}

Tools

import { tool } from "ai";
import { z } from "zod";

const result = await generateText({
  model: aiand("openai/gpt-oss-120b"),
  tools: {
    getWeather: tool({
      description: "Get current weather",
      parameters: z.object({ city: z.string() }),
      execute: async ({ city }) => `Sunny in ${city}, 22°C`,
    }),
  },
  prompt: "What's the weather in Tokyo?",
});