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OpenAI AI Models

Creator of the GPT family and ChatGPT. The most widely used AI API provider, with GPT-5.4 as the current flagship and o-series reasoning models leading on math and code.

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Models

Free Models

Open Source

$0.20/1M

Cheapest Input

OpenAI Models

Model	Input / 1M	Output / 1M	Context	ELO
GPT-5.4 nano	$0.20/1M	$1.25/1M	272K	1280	Details →
GPT-5.4 mini	$0.75/1M	$4.50/1M	272K	1360	Details →
o4-mini	$1.10/1M	$4.40/1M	200K	1350	Details →
o3	$2.00/1M	$8.00/1M	200K	1395	Details →
GPT-5.4	$2.50/1M	$15.00/1M	272K	1420	Details →

Compare OpenAI Models

GPT-5.4 nano vs GPT-5.4 mini GPT-5.4 nano vs o4-mini GPT-5.4 mini vs o4-mini GPT-5.4 mini vs o3 o4-mini vs o3 o4-mini vs GPT-5.4 o3 vs GPT-5.4