O3 Pro

by OpenAI

O3 Pro is OpenAI's extended-compute reasoning model, released June 10, 2025, pairing the problem-solving and tool integration of O3 with substantially more computation. It is built to think longer and provide more reliable responses on the hardest problems. The model supports full tool use, including web search, Python analysis, image and file processing, and image generation, and is available through the Responses API. Because it allocates extended compute to deeper analysis, requests can take several minutes to complete. Like O3, it accepts text and image input with a 200,000 token context window. O3 Pro suits complex business decisions, research, scientific problem-solving, and high-stakes engineering work where answer quality outweighs latency.

Key info

Input
Output
Features
Context window
200K
Max output
100K
Input price
$20.00 /1M
Output price
$80.00 /1M
  • US residency available
  • Zero data retention via Enterprise
  • No training by default
  • GDPR DPA available

Available routes

O3 Pro runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance β€” full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
OpenAIUSEnterpriseNo$20.00$80.00

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

Data handling per route

Each route hosting O3 Pro has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

OpenAI β€” United StatesπŸ‡ΊπŸ‡Έ

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

Benchmarks

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

Global rank#84 of 531 LLMs
TierStrong
Output speed22 tok/s
First token78.19s
Intelligence Index32.5
Reasoning & knowledge
GPQA Diamond
85%

Get started

Call O3 Pro through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β€” 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 β€” Claude Code, Cursor, Codex, and more β€” and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "openai/o3-pro",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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Side-by-side on privacy, EU hosting, pricing, and benchmarks.

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O3 Pro by OpenAI β€” pricing, benchmarks | Opper AI