GPT-5.2 Codex
GPT-5.2 Codex from OpenAI — text model on the Opper gateway.
ToolsStructured output
Context window
272K
Max output
128K
Input price
$1.75 /1M
Output price
$14.00 /1M
Benchmarks
Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.
Intelligence Index49.0
Coding Index43.0
GPQA Diamond
90%
Humanity's Last Exam
34%
SciCode
55%
IFBench
78%
Long-context reasoning
76%
Terminal-Bench Hard
37%
τ²-Bench Telecom
92%
See full leaderboard →Benchmarks via Artificial Analysis · View on AA
Available routes
The same GPT-5.2 Codex 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 | $1.75 | $14.00 |
Human review: Abuse-flagged only