GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Rank
#95
Up 27% week over week
Tokens
66.3B
2026-10-09
Requests
4.3M
4,283,580
Tool calls
-
Input / M
$5.00
Output / M
$30
Cache / M
$0.50
Context
1.1M
1,050,000 tokens