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openaiOpenAI: GPT-5.3 Chat
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.
openai/gpt-5.3-chat
Context Size
128K
Input Price
10,762.5 Ks/M
Output Price
86,100 Ks/M
Architecture
Text
Image
File
Supported Parameters
max_tokensresponse_formatseedstructured_outputstool_choicetools
Details
TokenizerGPT
Max Completion16,384 tokens
Provider Context128K tokens
ModeratedYes