Last refreshed 2026-05-19. Next refresh: weekly.
Why use o3-pro on OpenAI API?
OpenAI API offers o3-pro with pay-as-you-go pricing at $20.00/1M input tokens. OpenAI is a leading AI research and deployment company dedicated to developing safe and beneficial artificial general intelligence (AGI) for humanity.
Compare o3-pro across 3 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport OPENAI_API_KEY=...import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(o3-proRequest example
import os
from openai import OpenAI
client = OpenAI() # reads OPENAI_API_KEY from env
response = client.chat.completions.create(
model="o3-pro",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use the model slug directly, e.g. "gpt-4o" or "gpt-4.1-mini".
- The examples expect OPENAI_API_KEY; rename it only if your application config maps the new variable.
Compare o3-pro Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $20.00 | $80.00 |
| OpenAI API | $20.00 | $80.00 |
| Vercel AI Gateway | $20.00 | $80.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $20.00 |
| Output tokens | $80.00 |
Capabilities
About o3-pro
Advanced o3 reasoning model for complex math, science, and coding problems. Supports tools, vision, and extended thinking. Available to Pro users. Released June 10, 2025.
FAQ
What does o3-pro cost on OpenAI API?
On OpenAI API, o3-pro costs $20.00 per 1M input tokens and $80.00 per 1M output tokens.
What is the context window for o3-pro on OpenAI API?
o3-pro supports a 200k token context window on OpenAI API.
How does OpenAI API compare to other o3-pro providers?
o3-pro is available from 3 providers. The cheapest input pricing is $20/1M tokens from OpenRouter.
What API model ID do I use for o3-pro on OpenAI API?
Use the model ID o3-pro when calling OpenAI API's API.
Who created o3-pro?
o3-pro was created by OpenAI as part of the o3 model family.
Is o3-pro open source?
o3-pro is not open source; the seed data lists it as proprietary.