o1-pro

OpenAI · Released March 2025 · Knowledge cutoff October 2023

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...

It is part of OpenAI's GPT family, where Sol, Luna and Terra mark the current generation's capability tiers and Pro servings trade speed for deeper computation.

Facts and pricing

Provider

OpenAI

Context window

200K tokens

Input price

1650 credits / 1M tokens ($150.00 raw)

Output price

6600 credits / 1M tokens ($600.00 raw)

Vision (image input)

Yes

Tool calling

No

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.10x margin. Raw prices shown per 1M tokens.

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What o1-pro is best for

• Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
• Long documents: the 200K-token window holds lengthy reports, contracts or papers whole
• Working with images: screenshots, charts, photos and scanned documents alongside text

Example prompts

Prompts that suit a frontier model like o1-pro:

• Review this business plan and give me the three hardest questions an investor would ask
• Rewrite this announcement so it lands with both engineers and executives
• I am choosing between two job offers, help me think through the tradeoffs
• Draft a technical design doc for a rate limiter, including failure modes

OpenAI family

All 68 OpenAI models

Frequently asked questions

What is o1-pro?

o1-pro is an AI model by OpenAI. 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 o1-pro cost on Zeplik?

Input tokens cost 1650 credits per million and output tokens 6600 credits per million (1 credit = $0.10; the raw provider rates are $150.00 and $600.00 per million). New accounts start with free credits.

How long can a conversation with o1-pro be?

o1-pro has a 200K-token context window (200,000 tokens), which covers the conversation plus any documents you attach.

Does o1-pro support images and tools?

o1-pro accepts image input and does not support tool calling.

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