GPT-5.5 Pro
Highest-accuracy GPT-5.5 tier for slower, precision-heavy reasoning and coding
Context
1,000,000
Max output
128,000
Input / 1M
$37.50
Output / 1M
$225.00
Providers
1
01Profile
Profile
Released
2026-04-24
Last updated
2026-06-11
Knowledge cutoff
2025-12-01
Weights
Closed
02Capabilities
Capabilities
Input
text · image
Output
text
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Attachments
Yes
Cache read
—
Cache write
—
03Pricing
Pricing across 1 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
2+ recent events since 2026-04-24
2026-06-10ContextveniceMax output128,000→ new
2026-04-25Addedveniceoffering→ new