Does GPT-5.3 Codex support zero data retention?

Not self-serve on Pay-as-you-go. Zero data retention for GPT-5.3 Codex is available on request via Opper Enterprise — contact hello@opper.ai.

Where is GPT-5.3 Codex hosted?

GPT-5.3 Codex runs on both EU and US hosting routes through the Opper gateway. Pick the route that matches your residency requirement.

Is GPT-5.3 Codex trained on prompts and outputs?

No. Every hosting route for GPT-5.3 Codex is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for GPT-5.3 Codex?

Yes. A GDPR Data Processing Agreement is available on at least one route serving GPT-5.3 Codex. Contact hello@opper.ai to receive it.

GPT-5.3 Codex

by OpenAI

GPT-5.3 Codex from OpenAI — text model on the Opper gateway.

Try in chat Open in playground Compare

Key info

Input

Output

Features

Context window

272K

Max output

128K

Input price

$1.75 /1M

Output price

$14.00 /1M

EU residency available
US residency available
Zero data retention via Enterprise
No training by default
GDPR DPA available

Benchmarks

Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#13 of 518 LLMs

TierFrontier

Output speed77 tok/s

First token68.32s

Intelligence Index53.6

Coding Index53.1

GPQA Diamond

92%

Humanity's Last Exam

40%

SciCode

53%

IFBench

75%

Long-context reasoning

74%

Terminal-Bench Hard

53%

τ²-Bench Telecom

86%

See full leaderboard →Benchmarks via Artificial Analysis · View on AA

Available routes

GPT-5.3 Codex runs on 2 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output
Azure	EU	Enterprise	No	$1.75	$14.00
OpenAI	US	Enterprise	No	$1.75	$14.00

Training posture across routes: No training on prompts by default.

Data handling per route

Each route hosting GPT-5.3 Codex has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.