O
o3API
o3 (OpenAI): live API pricing, context window and the best open-source alternatives, tracked daily by olud.ai.
Prices update automatically — checked hourly against provider list prices.
Benchmarks & performance
Independent benchmark scores for o3, measured by Artificial Analysis. Higher is better.
About this model
o3 is a commercial AI model by OpenAI. The specifications below are tracked automatically: pricing is refreshed hourly from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is o3?
o3 is an AI language model from OpenAI. It is a proprietary model, available through an API. It scores 30.4 on the Artificial Analysis intelligence index.
Is o3 free?
o3 is not free: it costs $2 per million input tokens and $8 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is o3 good at?
Independent benchmarks from Artificial Analysis give it GPQA 82.7%, MMLU-Pro 85.3%, Humanity's Last Exam 20%, Long Context Reasoning 69.3%, LiveCodeBench 80.8%, SciCode 41%, MATH-500 99.2%, AIME 90.3%, AIME 2025 88.3%, IFBench 71.4%, τ²-Bench 80.7%, Terminal-Bench Hard 37.1%. It is particularly used for mathematical reasoning.
How fast is o3?
It generates about 127.1 tokens per second, with a median 5.92s delay before the first token. Measured independently by Artificial Analysis.