GPT-5.1
OpenAI's GPT-5.1 — incremental upgrade over GPT-5 with improved instruction following and coding.
VisionToolsStructured output
Context window
272K
Max output
128K
Input price
$1.25 /1M
Output price
$10.00 /1M
Benchmarks
Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.
Intelligence Index47.7
Coding Index44.7
Math Index94.0
MMLU-Pro
87%
GPQA Diamond
87%
Humanity's Last Exam
27%
LiveCodeBench
87%
SciCode
43%
AIME 2025
94%
IFBench
73%
Long-context reasoning
75%
Terminal-Bench Hard
46%
τ²-Bench Telecom
82%
See full leaderboard →Benchmarks via Artificial Analysis · View on AA
Available routes
The same GPT-5.1 runs on 2 different routes through the Opper gateway. Each route has its own data-handling posture.
| Provider | Region | Zero data retention | Training | Logging | Contract | Input | Output |
|---|---|---|---|---|---|---|---|
| Azure OpenAI | EU | Opt-in | No | Up to 30 days for abuse monitoring | EA/MCA-E | $1.25 | $10.00 |
| 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 | $1.25 | $10.00 |
Human review: Abuse-flagged only