All Models

GPT-5.3 Chat

openai/gpt-5.3-chat

The model powering ChatGPT is gpt-5.3-chat-latest: this is OpenAI's best general-purpose model, part of the GPT-5 flagship model family.

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index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.3-chat',
  prompt: 'Why is the sky blue?'
})