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OpenAI: o1 API Pricing

OpenAI: o1 is an API model from openai. It costs $15 per 1M input tokens and $60 per 1M output tokens, with cached input at $7.5. Its context window is 200,000 tokens with up to 100,000 output tokens. A workload of 10M input + 2M output tokens costs about $270 per month.
Input
$15
per 1M tokens
Output
$60
per 1M tokens
Cached input
$7.5
per 1M tokens
Context window
200K
200,000 tokens
Blended (80/20)
$24
per 1M tokens

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 OpenAI: o1 cost for a real workload?

At 10M input + 2M output tokens per month, OpenAI: o1 costs about $270 ($150 input + $120 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to OpenAI: o1?

Compare OpenAI: o1 with other models

OpenAI: o1 vs OpenAI: gpt-oss-20bOpenAI: o1 vs OpenAI: gpt-oss-20b (batch)OpenAI: o1 vs OpenAI: gpt-oss-120b (batch)OpenAI: o1 vs OpenAI: GPT-5 Nano (batch)OpenAI: o1 vs OpenAI: GPT-4.1 Nano (batch)OpenAI: o1 vs OpenAI: GPT-6 Luna Pro (batch)

Frequently asked questions

How much does OpenAI: o1 cost?

OpenAI: o1 costs $15 per 1M input tokens and $60 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $270.

What is the context window of OpenAI: o1?

OpenAI: o1 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?

Cheaper models include OpenAI: GPT-5 Pro (batch) ($7.5 in / $60 out), OpenAI: GPT Astra Latest ($10 in / $50 out), OpenAI: GPT-6 Astra ($10 in / $50 out). See the full list on this page.

Is OpenAI: o1 free to use?

No. OpenAI: o1 is a paid model at $15 input / $60 output per 1M tokens. 20 free models are listed on the free models page.

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