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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...
openai/gpt-5.3-chat
Context Size
128K
Input Price
262,500 pts/M
Output Price
2,100,000 pts/M
Architecture
Text
Image
File
Supported Parameters
max_completion_tokensmax_tokensresponse_formatseedstructured_outputstool_choicetools
Details
TokenizerGPT
Max Completion16,384 tokens
Provider Context128K tokens
ModeratedNo
CreatedMar 3, 2026