openai
OpenAI: GPT-5.3-Codex
openai/gpt-5.3-codex
For $1, you can send approximately:
~9.07messages
How do we get this number?
One message = ~7,000 input tokens + ~7,000 output tokens
Input cost per message7,000 x $1.75/M = $0.012250
Output cost per message7,000 x $14.00/M = $0.098000
Total cost per message$0.110250
Messages for $19.07
Context window
400k
tokens
Max response
128k
tokens
Input price
$1.75
per million tokens
Output price
$14.00
per million tokens
Modalities
Input:textInput:imageInput:fileOutput:text
Description
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...