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openai/gpt-5-3-chat
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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.
3/3/2026
128,000 tokens
Specifications
Modalities
Input
text
image
file
Output
text
Supported Parameters
max_tokens
response_format
seed
structured_outputs
tool_choice
tools