o3
OpenAI/Proprietary/1 provider
o3 is an advanced reasoning model that utilizes deep reinforcement learning and chain-of-thought processing to solve complex, multimodal coding, mathematics, and scientific problems with up to 100,000 output tokens.MoreLess
Which id to call
openai/o3:flexThis model has no managed policy yet, so call the provider endpoint directly. Every id in the endpoints table works the same way.
From /1M input
$1.00
OpenAI Inc.
Context
200K
100K output
Endpoints
2
1 region
Price spread
2.0x
2 endpoints
Capabilities 5/8
2 endpoints / 1 region
Providers serving o3
Provider prices, per 1M tokens. Pay as you go adds 5%, or 0% on your own keys.
| Rank | Privacy | ||||||
|---|---|---|---|---|---|---|---|
| 1 | OpenAI Inc. | Global | 200K | $1.00 | $4.00 | $0.25 | no-train |
| 2 | OpenAI Inc. | Global | 200K | $2.00 | $8.00 | $0.50 | no-train |
A column is blank where no qualifying sample exists, and every row links to that provider's endpoint page.
model=
Which id to call
One base url, https://router.requesty.ai/v1, and one key for every id here.
openai/o3:flexThis model has no managed policy yet, so call the provider endpoint directly. Every id in the endpoints table works the same way.
OpenAI compatible
Call it in three lines
Change the base url, use your Requesty key, set the model to any id on the left. Existing OpenAI SDK code needs no other edit.
123456789101112131415from openai import OpenAI client = OpenAI( api_key="YOUR_REQUESTY_API_KEY", base_url="https://router.requesty.ai/v1", ) response = client.chat.completions.create( model="openai/o3:flex", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ], ) print(response.choices[0].message.content)
Artificial Analysis
Benchmark scores
Graduate-level physics, chemistry & biology questions designed to resist Googling.
Artificial Analysis Intelligence Index: a composite of multiple evaluations measuring overall model capability.
Scores from artificialanalysis.ai. They measure the model, not the provider, so they are the same on every endpoint above.
6
More from OpenAI
Reference
o3 questions
Which providers serve o3?
o3 is available from 1 provider through Requesty: OpenAI Inc.. All endpoints share one OpenAI-compatible API and one key, and Requesty fails over between them automatically.
How much does o3 cost?
Pricing starts at $1.00 per million input tokens and $4.00 per million output tokens on OpenAI Inc., the cheapest endpoint. Prices vary by provider and region; the table above shows every endpoint. Those are the upstream provider rates: pay as you go adds 5% on top, or 0% if you bring your own provider keys.
Is o3 open weights?
No. o3 is a proprietary model from OpenAI, served through OpenAI's own API and licensed cloud platforms.
What is the context window of o3?
o3 supports up to 200K tokens of context, with up to 100K output tokens per response. Some providers expose a smaller window; check the per-endpoint context column above.
How do I use o3 with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "openai/o3:flex" or any endpoint id from the table above. The quickstart section shows Python, JavaScript and cURL snippets.
Route o3 through one endpoint
One key for 1 provider on this model and 600+ others. No markup on provider prices, automatic failover, caching built in.