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GPT-5.3-Instant

OpenAI · gpt-5-3-instant

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Chat-tuned GPT model for conversational assistance, writing, and tool workflows

Specification

most-agreed values

Context
128K
Max output
16K
Released
2026-03-03
Knowledge cutoff
2025-08-31
Retires
—
Open weights
no
Input
text, image
Output
text

Price

US dollars per million tokens · most-agreed

Input
$1.60
Output
$13.00
Cache read
$0.16

Available from 2 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
poe$1.60$13.00$0.16—128K16K—
chatgpt · chatgpt————128K64K—

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