OpenAI · API pricing

GPT-5.3 Codex API pricing

GPT-5.3 Codex costs $1.75 per million input tokens and $14.00 per million output tokens on OpenAI's standard tier, and cached input is $0.17. Checked against the official pricing page on October 12, 2026.

Input / 1M$1.75

Cached input / 1M$0.17

Output / 1M$14.00

Context window–

Coding model.

What GPT-5.3 Codex costs for common workloads

Workload	Monthly cost	Rank of 20
Support chatbot 60,000 requests · 1,500 in / 300 out	$410	#17
Document summaries 20,000 requests · 6,000 in / 400 out	$322	#16
Coding assistant 30,000 requests · 4,000 in / 800 out	$546	#17
RAG search 100,000 requests · 2,500 in / 250 out	$788	#16

Price it for your own workload

Compared against similar models from other providers.

Start from a use case

Requests per month Input tokens per request Output tokens per request

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

Grok Build 0.1

xAICheapest

$126 /mo

GPT-5.3 Codex

OpenAI

$410 /mo

Compare GPT-5.3 Codex

GPT-5.3 Codex vs Grok Build 0.1