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OpenAI: o1-pro API Pricing

OpenAI: o1-pro is an API model from openai. It costs $150 per 1M input tokens and $600 per 1M output tokens. Its context window is 200,000 tokens with up to 100,000 output tokens. A workload of 10M input + 2M output tokens costs about $2,700 per month.
Input
$150
per 1M tokens
Output
$600
per 1M tokens
Cached input
—
per 1M tokens
Context window
200K
200,000 tokens
Blended (80/20)
$240
per 1M tokens

The o1 series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o1-pro model uses more compute to think harder and provide...

How much does OpenAI: o1-pro cost for a real workload?

At 10M input + 2M output tokens per month, OpenAI: o1-pro costs about $2,700 ($1,500 input + $1,200 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to OpenAI: o1-pro?

Compare OpenAI: o1-pro with other models

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Frequently asked questions

How much does OpenAI: o1-pro cost?

OpenAI: o1-pro costs $150 per 1M input tokens and $600 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $2,700.

What is the context window of OpenAI: o1-pro?

OpenAI: o1-pro has a context window of 200,000 tokens and can return up to 100,000 output tokens per response.

What are cheaper alternatives to OpenAI: o1-pro?

Cheaper models include OpenAI: GPT-5.5 Pro ($30 in / $180 out), OpenAI: GPT-5.4 Pro ($30 in / $180 out), OpenAI: GPT-5.2 Pro ($21 in / $168 out). See the full list on this page.

Is OpenAI: o1-pro free to use?

No. OpenAI: o1-pro is a paid model at $150 input / $600 output per 1M tokens. 20 free models are listed on the free models page.

Provider: openai · Model ID: openai/o1-pro · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices