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GPT 5.5 (Fast)

OpenAI · gpt-5-5-fast

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Default frontier GPT for coding, computer use, research, and knowledge work

Specification

most-agreed values

Context
1M
Max output
128K
Released
2026-04-23
Knowledge cutoff
2025-12-01
Retires
Open weights
no
Input
text, image, pdf
Output
text

Price

US dollars per million tokens · most-agreed

Input
$12.50
Output
$75.00
Cache read
$1.25

Available from 1 host

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
vercel$12.50$75.00$1.251M128K

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