OpenAI · LLM API Modelactive

o4-mini-2025-04-16

OpenAI pricing for o4-mini-2025-04-16.

Updated September 21, 2026

Input / 1M

$4.00

Output / 1M

$16.00

Cached Input

$1.00

Context Window

128K

Standard Input

$4.00 / 1M

Base prompt input rate

Standard Output

$16.00 / 1M

Completion output rate

Prompt Caching -50%

$1.00 / 1M

Cached prompt context

Batch API -50%

$2.00 / 1M

Asynchronous 24h batch

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Finetuning

All rates listed in USD per 1 Million (1M) tokens unless noted

StandardBatch

Pricing Metric / Parameter	Standard RATE (per 1M)	Batch RATE (per 1M)
Training	$100.00 / hour	$100.00 / hour
Input	$4.00	$2.00
Cached input	$1.00	$0.50
Output	$16.00	$8.00

Source: OpenAI official pricing page, verified 2026-09-21. Prices in USD per 1M tokens.

AI / LLM

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