o3
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
o3 is a well-rounded and powerful model across domains.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 200 K tokens
- Max output
- 100 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $8.00
- Cache read, $ per 1M
- $0.500
- Batch (input / output)
- $1.00 / $4.00
- Tool calling
- Yes
- Released
- 04/16/2025
- Knowledge cutoff
- 2024-05
- API id
- openai/o3
Summary from the data
o3 is a OpenAI model available by API since 04/16/2025. It costs $2.00 per million input tokens and $8.00 per million output tokens, accepts 200 K tokens of context and generates up to 100 K tokens per response. Input: image, text, PDF / file; output: text. It has a reasoning mode. It supports tool calling. With 10,000 requests a month of 1,500 input and 400 output tokens it would cost about $62.00 a month.
Compare o3 with…
What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
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Frequently asked questions
How much does o3 cost per million tokens?
o3 costs $2.00 per million input tokens and $8.00 per million output tokens (USD, list price). Cache read: $0.500. Batch tier: $1.00 / $4.00.
What context window does o3 have?
o3 accepts 200 K tokens of context per request and generates up to 100 K tokens per response.
Does o3 accept images, audio or files?
Input: image, text, PDF / file. Output: text.
Does o3 have a reasoning mode and tool calling?
It has a reasoning mode. It supports tool calling.
When was o3 released and what is its knowledge cutoff?
o3 has been available by API since 04/16/2025. Knowledge cutoff: 2024-05.
What would an app built on o3 cost?
With 10,000 requests a month of 1,500 input and 400 output tokens, o3 would cost about $62.00 a month at list price, without cache or batch discounts.
What is the API id of o3?
The id is openai/o3. It is the name passed in the model parameter of the API (or on OpenRouter).
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.