OpenAI: OpenAI o3 Pro
openai/o3-pro
Access OpenAI o3 Pro from OpenAI using Puter.js AI API.
Get Started// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "openai/o3-pro"
}).then(response => {
document.body.innerHTML = response.message.content;
});
<html>
<body>
<script src="https://js.puter.com/v2/"></script>
<script>
puter.ai.chat("Explain quantum computing in simple terms", {
model: "openai/o3-pro"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://api.puter.com/puterai/openai/v1/",
api_key="YOUR_PUTER_AUTH_TOKEN",
)
response = client.chat.completions.create(
model="openai/o3-pro",
messages=[
{"role": "user", "content": "Explain quantum computing in simple terms"}
],
)
print(response.choices[0].message.content)
curl https://api.puter.com/puterai/openai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_PUTER_AUTH_TOKEN" \
-d '{
"model": "openai/o3-pro",
"messages": [
{"role": "user", "content": "Explain quantum computing in simple terms"}
]
}'
Model Card
OpenAI o3 Pro is a version of o3 designed to think longer and provide the most reliable responses for challenging questions. It's recommended when reliability matters more than speed.
Context Window 200K
tokens
Max Output 100K
tokens
Input Cost $20
per million tokens
Output Cost $80
per million tokens
Input text, image
modalities
Tool Use Yes
Knowledge Cutoff May 2024
Release Date Jun 10, 2025
Output Speed 21
tokens / sec
Latency 99.79s
time to first token
Model Playground
Try OpenAI o3 Pro instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
Benchmarks
How OpenAI o3 Pro performs on standard evaluations.
| Benchmark | Score |
|---|---|
| GPQA Diamond Graduate-level science Q&A | 84.5% |
Scores sourced from Artificial Analysis.
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ChatGPT-5.4 Nano
GPT-5.4 Nano is the smallest and cheapest model in the GPT-5.4 family, offering a 400k context window at just $0.20/1M input tokens. It excels at classification, data extraction, ranking, and coding sub-agent tasks, outperforming the previous GPT-5 Mini on SWE-Bench Pro (52.4% vs 45.7%). It's ideal for high-volume, low-latency workloads and as a fast sub-agent in multi-model architectures.
ChatGPT-5.4
GPT-5.4 is OpenAI's latest frontier model released on March 5, 2026, designed for complex professional work with a 1.05M token context window, built-in computer-use capabilities, and improved coding from GPT-5.3-Codex. It is 33% less likely to make factual errors per claim compared to GPT-5.2 and scores 83% on OpenAI's GDPval knowledge work benchmark.
Frequently Asked Questions
You can access OpenAI o3 Pro by OpenAI through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
Yes, it is free if you're using it through Puter.js. With the User-Pays Model, you can add OpenAI o3 Pro to your app at no cost — your users pay for their own AI usage directly, making it completely free for you as a developer.
| Price per 1M tokens | |
|---|---|
| Input | $20 |
| Output | $80 |
OpenAI o3 Pro was created by OpenAI and released on Jun 10, 2025.
OpenAI o3 Pro supports a context window of 200K tokens. For reference, that is roughly equivalent to 400 pages of text.
OpenAI o3 Pro can generate up to 100K tokens in a single response.
OpenAI o3 Pro has a knowledge cutoff date of May 2024. This means the model was trained on data available up to that date.
OpenAI o3 Pro accepts the following input types: text, image. It produces: text.
Yes, OpenAI o3 Pro supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.
Yes — the OpenAI o3 Pro API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.
Get started with Puter.js
Add OpenAI o3 Pro to your app without worrying about API keys or setup.
Read the Docs View Tutorials