o1

OpenAI · Released December 2024 · Knowledge cutoff October 2023

The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding. The o1 model series is trained with large-scale reinforcement learning to reason...

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

165 credits / 1M tokens ($15.00 raw)

Output price

660 credits / 1M tokens ($60.00 raw)

Vision (image input)

Yes

Tool calling

Yes

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 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
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a frontier model like o1:

• 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 90 OpenAI models

Frequently asked questions

What is o1?

o1 is an AI model by OpenAI. The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding. The o1 model series is trained with large-scale reinforcement learning to reason...

How much does o1 cost on Zeplik?

Input tokens cost 165 credits per million and output tokens 660 credits per million (1 credit = $0.10; the raw provider rates are $15.00 and $60.00 per million). New accounts start with free credits.

How long can a conversation with o1 be?

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

Does o1 support images and tools?

o1 accepts image input and supports tool calling.

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