GPT 5.5
LatestOpenAI
•
Proprietary# 2
Released
Apr 23, 2026
# 1
Knowledge Cutoff
Dec 25
# 3
Context Length
1M
Benchmarks
# 42
Code RankedAGI
66.7%
# 1
Terminal Bench 2.0
82.7%
# 3
Agentic RankedAGI
79.9%
# 5
Browse Comp
84.4%
# 4
Code Livebench
82.5%
# 6
AgenticCode LiveBench
56.7%
# 2
OSWorld Verified
78.7%
# 2
Cyber Gym
81.8%
# 10
RAGI Overall
65.6%
# 1
Toolathlon
55.6%
Pricing
# 39
Input Cost /M
$5
# 45
Output Cost /M
$30
# 24
Cached Cost /M
$0.5