GPT-5.5
OpenAI's newest frontier model for complex professional work. 1M context window with reasoning.
ReasoningVisionToolsStructured output
Context window
1.1M
Max output
128K
Input price
$5.00 /1M
Output price
$30.00 /1M
Benchmarks
Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.
Intelligence Index60.2
Coding Index59.1
GPQA Diamond
94%
Humanity's Last Exam
44%
SciCode
56%
IFBench
76%
Long-context reasoning
74%
Terminal-Bench Hard
61%
τ²-Bench Telecom
94%
See full leaderboard →Benchmarks via Artificial Analysis · View on AA
Available routes
The same GPT-5.5 runs on 1 route through the Opper gateway. Each route has its own data-handling posture.
| Provider | Region | Zero data retention | Training | Logging | Contract | Input | Output |
|---|---|---|---|---|---|---|---|
| OpenAI | US | Opt-in | No (opt-in) | Up to 30 days for abuse monitoring on stateless endpoints. Stateful endpoints (Conversations, ChatKit, Vector Stores) retain until deleted. | Enterprise | $5.00 | $30.00 |
Human review: Abuse-flagged only