o3 - API Pricing & Providers

Providers for o3

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for o3

Compare different providers across OpenRouter

Effective Pricing for o3

Actual cost per million tokens across providers over the past hour

Apps using o3

Top public apps this month

Recent activity on o3

Total usage per day on OpenRouter

Prompt

37.2M

Reasoning

5.71M

Completion

3.45M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for o3

Uptime stats for o3 across all providers

Sample code and API for o3

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

OpenAI: o3

openai/o3

OpenAI: o3

openai/o3

Providers for o3

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for o3

Compare different providers across OpenRouter

Effective Pricing for o3

Actual cost per million tokens across providers over the past hour

Apps using o3

Top public apps this month

Recent activity on o3

Total usage per day on OpenRouter

Uptime stats for o3

Uptime stats for o3 across all providers

Sample code and API for o3

OpenRouter normalizes requests and responses across providers for you.

Using third-party SDKs

Providers for o3

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for o3

Compare different providers across OpenRouter

Effective Pricing for o3

Actual cost per million tokens across providers over the past hour

Apps using o3

Top public apps this month

Recent activity on o3

Total usage per day on OpenRouter

Uptime stats for o3

Uptime stats for o3 across all providers

Sample code and API for o3

OpenRouter normalizes requests and responses across providers for you.

Using third-party SDKs