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GPT-5.3 Chat

GPT-5.3 Chat is a conversational variant in the GPT-5.3 generation, optimized for tone, relevance, and conversational flow with reduced hallucination rates and fewer unnecessary refusals.

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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?'
})
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Playground

Try out GPT-5.3 Chat by OpenAI. Usage is billed to your team at API rates. Free users (those who haven't made a payment) get $5 of credits every 30 days.