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?'})Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
 OpenAI | 128K | 0.7s | 61tps | $1.75/M | $14.00/M | Read:$0.17/M Write:— | $10.00/K + input costs | — | +4 | 03/03/2026 |