OpenAI · LLM API Modelactive

gpt-5.3-codex

gpt-5.3-codex costs $1.75 per 1M input tokens, $0.175 cached input and $14.00 per 1M output tokens.

Updated September 21, 2026

Input / 1M

$1.75

Output / 1M

$14.00

Cached Input

$0.175

Context Window

272K

Standard Input

$1.75 / 1M

Base prompt input rate

Standard Output

$14.00 / 1M

Completion output rate

Prompt Caching -50%

$0.175 / 1M

Cached prompt context

Batch API -50%

50% Off

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Specialized models

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

StandardFast mode

Pricing Metric / Parameter	Standard RATE (per 1M)	Fast mode RATE (per 1M)
Category	Codex	Codex
Input	$1.75	$3.50
Cached input	$0.175	$0.35
Output	$14.00	$28.00

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

AI / LLM

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