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Claude Opus 5.5 Fast

Anthropic · claude-opus-5-5-fast

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Flagship Claude model for deep reasoning, coding, and long-horizon agents

Specification

most-agreed values

Context
1M
Max output
128K
Released
2026-09-26
Knowledge cutoff
2026-06
Retires
—
Open weights
no
Input
text, image
Output
text

Price

US dollars per million tokens · most-agreed

Input
$9.60
Output
$48.00
Cache read
$0.48
Cache write
$12.00

Available from 2 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
vercel$8.00$40.00$0.40$10.001M128K—
venice$9.60$48.00$0.48$12.001M128K—

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