OpenAI o1 Pro
OpenAI o1 Pro is a language model from OpenAI released on Mar 19, 2025. It reads text, images and files and writes text, with a 200K token context window and up to 100K tokens per reply.
Show moreShow less
It costs $150 per million input tokens and $600 per million output tokens. Cached input bills at $75, 50% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
5 providers serve it, including Poe, Eden AI and Kilo Gateway. The lowest input price is $140 per million tokens at Poe.
- Modalities
- In / out price
- $150 / $600 per 1M
- Context
- 200K
- Max output
- 100K
- Released
- Mar 19, 2025
- Knowledge cutoff
- Sep 2023
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
OpenAI o1 Pro pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $150 / 1M tokens | |
|---|---|---|
| Output | $600 / 1M tokens | |
| Cached input (read) | $75 / 1M tokens | 50% off input |
OpenAI o1 Pro providers
5 providers serve it, including Poe, Eden AI and Kilo Gateway. The lowest input price is $140 per million tokens at Poe. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Poe | $140 | $540 | – | 200K | 100K |
| Eden AI | $150 | $600 | – | 200K | 100K |
| Kilo Gateway | $150 | $600 | – | 200K | 100K |
| NanoGPT | $150 | $600 | $75 | 200K | 100K |
| AI/ML API | $206.31 | $825.24 | – | 200K | 100K |
What OpenAI o1 Pro costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call OpenAI o1 Pro through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs
Alternatives to OpenAI o1 Pro
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 19 providers.
by openaiApr 8, 2026$30/M input tokens$180/M output tokens19 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning.
by openaiSep 4, 2026$20/M input tokens$100/M output tokens
- 200K context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 3 providers.
by anthropicAug 5, 2025$15/M input tokens$75/M output tokens3 providers
- 200K context
Reads text, images and files. Tool calling, structured output. Served by 15 providers.
by anthropicAug 5, 2025$15/M input tokens$75/M output tokens15 providers
- 200K context
Reads text, images and files. Tool calling, structured output, reasoning.
by anthropicMay 22, 2025$15/M input tokens$75/M output tokens
- 193K context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 5 providers.
by anthropicMay 14, 2025$15/M input tokens$75/M output tokens5 providers
More from OpenAI
- Index 51.8
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 29, 20261.05M context$2/M input tokens$10/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 29, 2026$2/M input tokens$10/M output tokens2 providers
- Index 38.1
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 22, 20261.05M context$0.10/M input tokens$0.50/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 22, 2026$0.10/M input tokens$0.50/M output tokens2 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 27 providers.
by openaiSep 22, 2026$2/M input tokens$10/M output tokens27 providers
- 1.05M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 2 providers.
by openaiSep 22, 2026$2/M input tokens$10/M output tokens2 providers
OpenAI o1 Pro questions
How much does the OpenAI o1 Pro API cost?
$150 per million input tokens and $600 per million output tokens, with cached input at $75. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of OpenAI o1 Pro?
200,000 tokens of input, and it can write up to 100,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve OpenAI o1 Pro?
5 providers serve it, including Poe, Eden AI and Kilo Gateway. The lowest input price is $140 per million tokens at Poe. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does OpenAI o1 Pro support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is OpenAI o1 Pro open source?
No. OpenAI serves it through an API only, so you cannot download the weights or host it yourself.
When was OpenAI o1 Pro released?
Mar 19, 2025, with training data up to Sep 2023.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on OpenAI o1 Pro?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
Book Meeting