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OpenAI: GPT-5.3 Chat
openai/gpt-5.3-chat
VisionTool useJSONStreaming
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...
Pricing
Input
$1.75 / 1M
Output
$14.00 / 1M
Specs
Context
128,000 tokens
Input
text, image, file
Output
text
Released: 2026-03
Supported parameters
max_completion_tokensmax_tokensresponse_formatseedstructured_outputstool_choicetools