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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.

Vision (Image)File InputTool UseReasoningImplicit CachingWeb Search
index.ts
import { streamText } from 'ai'
const result = streamText({
model: 'openai/gpt-5.3-chat',
prompt: 'Why is the sky blue?'
})

Providers

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Provider
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
OpenAI
Legal:Terms
Privacy
128K
1.1s
62tps
$1.75/M$14.00/M
Read:$0.17/M
Write:
$10.00/K
+ input costs
03/03/2026