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GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly reduces unnecessary refusals, caveats, and overly cautious phrasing that can interrupt conversational flow.
Price/1M
$4.81
619th cheapest
1452% above median
Top 91%
Context Window
128K
225th largest
Top 75%
Input
$1.75
per 1M tokens
Output
$14.00
per 1M tokens
Blended
$4.81
per 1M tokens
Cheaper than 9% of models. Median price is $0.31/1M tokens.
Daily
$4.81
Monthly
$144.38
Context Window
128K
tokens
Larger than 25% of models
Max Output
16K
tokens
13% of context
Context Window Comparison