OpenAI
O
GPT-5.3 ChatAPI
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful.
Context window
128K
tokens
Input price
$1.75
per M tokens
Output price
$14
per M tokens
Provider
OpenAI
Prices update automatically — checked hourly against provider list prices.
- $4.81 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 26% of the 173 commercial models tracked here
- 49 of 70 OpenAI models tracked here, from cheapest
About this model
GPT-5.3 Chat is a commercial AI model by OpenAI. The specifications below are tracked automatically: pricing is refreshed hourly from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is GPT-5.3 Chat?
GPT-5.3 Chat is an AI language model from OpenAI. It is a proprietary model, available through an API.
Is GPT-5.3 Chat free?
GPT-5.3 Chat is not free: it costs $1.75 per million input tokens and $14 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.