GPT-5.5
Default frontier GPT for coding, computer use, research, and knowledge work
Context
1,000,000
Max output
128,000
Input / 1M
$3.00
Output / 1M
$18.00
Providers
1
01Profile
Profile
Released
2026-05-29
Last updated
2026-05-29
Knowledge cutoff
2025-12-30
Weights
Closed
02Capabilities
Capabilities
Input
text · image
Output
text
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Attachments
No
Cache read
—
Cache write
—
03Pricing
Pricing across 1 providers
Per 1M tokens, USD. Sorted by input price. First-party row highlighted.
04History
Change history
1+ recent events since 2026-05-29
2026-06-04Addedxpersonaoffering→ new