GPT 5.5 Pro
LatestOpenAI
•
Proprietary# 4
Released
Apr 23, 2026
# 1
Knowledge Cutoff
Dec 25
# 3
Context Length
1M
Benchmarks
# 2
Code RankedAGI
91.9%
# 2
Agentic RankedAGI
90.2%
# 1
Browse Comp
90.1%
# 4
Reason RankedAGI
82.8%
# 6
HLE
43.1%
# 4
HLE w/ Tools
57.2%
# 95
Math RankedAGI
61.1%
# 2
RAGI RankedAGI
75.4%
# 3
ARC AGI 2.0
84.2%
Pricing
# 46
Input Cost /M
$30
# 54
Output Cost /M
$180