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by OpenAI

OpenAI: o3 Pro.

multimodal closed 200K ctx
Cheapest input
$20.0/M
on OpenAI API
Cheapest output
$80.0/M
on OpenAI API
Fastest
38 tok/s
on OpenRouter
Hosted equiv.
~$28.8/hr
@ 100 tok/s on OpenAI API

The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently...

Hosted API only

No self-host path — closed weights.

OpenAI: o3 Pro's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenAI API api direct $20.0 $80.0 Launch ↗
OpenRouter api aggregator $20.0 $80.0 Launch ↗
Performance

Speed across providers.

Tokens/sec and time-to-first-token measured against the same prompt template on each provider's API.

Provider Tokens/sec TTFT Total
OpenRouter 37.8 13225 ms 13245 ms
FAQ

Frequently asked.

How do I run OpenAI: o3 Pro?
OpenAI: o3 Pro is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access OpenAI: o3 Pro?
OpenAI: o3 Pro is available via OpenAI API, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run OpenAI: o3 Pro?
API pricing starts at $20.0/M input tokens and $80.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is OpenAI: o3 Pro open-source or proprietary?
OpenAI: o3 Pro is a proprietary model from OpenAI. Access is API-only — there are no public weights to download.