GPT 5.5 Pro
LatestOpenAI
•
Proprietary# 17
Released
Apr 23, 2026
# 1
Knowledge Cutoff
Dec 25
# 3
Context Length
1M
Benchmarks
# 4
Code RankedAGI
87.7%
# 2
Agentic RankedAGI
89.1%
# 1
Browse Comp
90.1%
# 6
Reason RankedAGI
82.5%
# 9
HLE
43.1%
# 7
HLE w/ Tools
57.2%
# 84
Math RankedAGI
65.5%
# 4
RAGI RankedAGI
74.5%
# 3
ARC AGI 2.0
84.2%
Pricing
# 48
Input Cost /M
$30
# 57
Output Cost /M
$180