When was O3 released?

OpenAI released O3 on 16 Apr 2025. It is available through the Opper gateway.

Does O3 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.

O3 runs on US hosting routes through the Opper gateway.

Is O3 trained on prompts and outputs?

No. Every hosting route for O3 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for O3?

Yes. A GDPR Data Processing Agreement is available on at least one route serving O3. Contact hello@opper.ai to receive it.

O3

by OpenAI

All OpenAI releases

O3 is OpenAI's advanced reasoning model, pairing stronger performance with broader tool use. In expert evaluations it makes about 20 percent fewer major errors than O1 on difficult real-world tasks, with particular gains in programming, business and consulting work, and creative ideation. The model thinks before responding and can use tools within a single reasoning session, searching the web, analyzing files with Python, reasoning over visual inputs, and generating images. It accepts text and image input, with a 200,000 token context window and up to 100,000 output tokens. O3 supports streaming, function calling, and structured outputs through the Chat Completions and Responses APIs, making it suitable for complex multi-step problems that span code, analysis, and visual reasoning.

Call O3 on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

200K

Max output

100K

Input price

$2.00 /1M$0.50 cache read

Output price

$8.00 /1M

Released

16 Apr 2025

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

Available routes

O3 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	$2.00	$8.00	$0.50

Uptime and availability

O3 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 O3 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

Benchmarks

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

Global rank#209 of 664 LLMs

TierEfficient

Output speed149 tok/s

First token7.03s

Intelligence Index20.2

Math Index88.3

Reasoning & knowledge

MMLU-Pro

85%

GPQA Diamond

83%

Humanity's Last Exam

20%

Long-context reasoning

75%

Coding

LiveCodeBench

81%

Agentic & tool use

Terminal-Bench Hard

37%

τ²-Bench Telecom

81%

Math & instruction following

AIME 2025

88%

IFBench

71%

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

Get started

Call O3 through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

O3 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/o3",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);