OpenAI’s GPT-5.3-Codex model is now available through Netlify’s AI Gateway with zero configuration required.

Use the OpenAI SDK directly in your Netlify Functions without managing API keys or authentication. The AI Gateway handles everything automatically. Here’s an example using the GPT-5.3-Codex model:

import OpenAI from 'openai';
export default async () => {
    const openai = new OpenAI();
    const response = await openai.responses.create({
        model: 'gpt-5.3-codex',
        input: 'How can AI improve my coding?'
    });
    return Response.json(response);
};

GPT-5.3-Codex is available for all Function types. You get automatic access to Netlify’s caching, rate limiting, and authentication infrastructure.

Learn more in the AI Gateway documentation.