Does GPT-5.1 Codex Max support zero data retention?

Not self-serve on Pay-as-you-go. Zero data retention for GPT-5.1 Codex Max is available on request via Opper Enterprise — contact hello@opper.ai.

Where is GPT-5.1 Codex Max hosted?

GPT-5.1 Codex Max runs on US hosting routes through the Opper gateway.

Is GPT-5.1 Codex Max trained on prompts and outputs?

No. Every hosting route for GPT-5.1 Codex Max is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for GPT-5.1 Codex Max?

Yes. A GDPR Data Processing Agreement is available on at least one route serving GPT-5.1 Codex Max. Contact hello@opper.ai to receive it.

GPT-5.1 Codex Max

by OpenAI

GPT-5.1 Codex Max is the most capable Codex variant in the GPT-5.1 family, with a 272,000-token context window built for demanding, long-horizon development work. It targets large-scale code generation, complex refactoring, cross-file consistency, and detailed debugging. Designed for teams tackling architecture decisions, multi-service integrations, and extended coding projects, it supports function calling and structured outputs so it can drive automated code workflows across a full codebase.

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

272K

Max output

128K

Input price

$1.25 /1M

Output price

$10.00 /1M

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

Available routes

GPT-5.1 Codex Max runs on 1 route 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
OpenAI	US	Enterprise	No	$1.25	$10.00

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

Data handling per route

Each route hosting GPT-5.1 Codex Max has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

OpenAI — United States🇺🇸

Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.

Zero data retention: Available via Opper Enterprise contract.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Third-party access: None disclosed
GDPR DPA: DPA available
Transfer mechanism: SCCs

Get started

Call GPT-5.1 Codex Max through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into your coding agent — Claude Code, Cursor, Codex, and more — and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "openai/gpt-5.1-codex-max",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);