Using o3 on OpenAI API

Quick Start

1. 1
   Create an account at OpenAI API and generate an API key.
2. 2
   Use the OpenAI API SDK or REST API to call o3 — see the documentation for request format.
3. 3
   You'll be billed $2.00/1M input, $8.00/1M output tokens. See full pricing.

Code Examples

import os
from openai import OpenAI

client = OpenAI()  # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
    model="o3",
    messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)

Pricing on OpenAI API

Capabilities

About o3

OpenAI o3 reasoning model with advanced multi-step problem-solving capabilities.