When was GPT-5.4 pro released?

OpenAI released GPT-5.4 pro on 5 Mar 2026. It is available through the Opper gateway.

Does GPT-5.4 pro support zero data retention?

Not by default. See the per-route data-handling section for each route's logging stance and retention window.

Where is GPT-5.4 pro hosted?

GPT-5.4 pro runs on US hosting routes through the Opper gateway.

Is GPT-5.4 pro trained on prompts and outputs?

No. Every hosting route for GPT-5.4 pro is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for GPT-5.4 pro?

Yes. A GDPR Data Processing Agreement is available on at least one route serving GPT-5.4 pro. Contact hello@opper.ai to receive it.

GPT-5.4 pro

by OpenAI

Released 28 days after GPT-5.3 Codex · All OpenAI releases

GPT-5.4 Pro uses more compute to think harder and provide consistently better answers than GPT-5.4, making it OpenAI's most capable option for complex reasoning tasks. With a 1M token context window and configurable reasoning effort levels, it handles the most demanding professional work. The model supports vision, tool use, and structured output, enabling sophisticated agentic workflows and multimodal reasoning. Because GPT-5.4 Pro is built to tackle hard problems, some requests may take several minutes to complete, trading latency for depth of reasoning. GPT-5.4 Pro is well suited to professionals and organizations that need maximum performance on knowledge work, research, coding, and analysis tasks that demand extended reasoning and accuracy.

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

1.1M

Max output

128K

Input price

$30.00 /1M

Output price

$180.00 /1M

Released

5 Mar 2026

US residency available
No training by default
GDPR DPA available

Available routes

GPT-5.4 pro 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	Not by default	No	$30.00	$180.00

Uptime and availability

GPT-5.4 pro runs on a single route through the Opper gateway today, so its availability is that provider's availability.

96.06%route uptime, last 30 days

Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting GPT-5.4 pro 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 not on by default — abuse monitoring, 30-day retention. No training on customer data. US; SCCs; DPA available.

Zero data retention: Not by default — abuse monitoring, 30-day retention. Derived from the logging and moderation facts.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Moderation: Not established
Caching: Not established
Subprocessor access: Not established
GDPR DPA: DPA available
Transfer mechanism: SCCs

Get started

Call GPT-5.4 pro 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 a coding agent like Claude Code, Cursor or Codex 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-5.4-pro",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);