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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. Your use subject to OpenAI's Terms & Privacy Policies.

File InputImplicit CachingTool UseVision (Image)Web Search
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
Context
Max Output
Latency
Throughput
Input
Output
Cache
Web Search
Capabilities
ZDR
No Training
Release Date
128K16K
0.9s
52tps
$1.75/M
$14/M
Read:$0.17/M
Write:
$10/K
+ input costs
+2
03/03/2026