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?

With abuse monitoring, yes. On OpenAI through the Opper gateway, prompts and outputs are not used for training and are kept only for abuse monitoring, for up to 30 days.

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.

Call GPT-5.4 pro on Opper with the OpenAI SDK. Sign up without a credit card. Get started

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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
Zero data retention with abuse monitoring
No training by default
GDPR DPA available

Available routes

GPT-5.4 pro runs on 1 route through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
OpenAI	US		No	$30.00	$180.00	Input price

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.

94.61%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 with abuse monitoring: prompts and outputs are kept for up to 30 days for abuse monitoring only, and are not used for training. No training on customer data. US; SCCs; DPA available.

Zero data retention: With abuse monitoring, 30-day window.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Abuse monitoring: On by default, holds flagged content, 30 days, a person can view samples
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

Get started

Call GPT-5.4 pro through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

GPT-5.4 pro is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

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);