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.
Modalities
Context
128K
Released
Mar 3, 2026
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.
GPT-5.3 Chat has a 128,000 token context window.
GPT-5.3 Chat accepts text, images and files such as PDFs as input and returns text.
GPT-5.6 Luna Pro, GPT-5.6 Luna, GPT-5.6 Terra Pro and 56 more are other text models from OpenAI.
GPT-5.3 Chat was released on March 3, 2026.
Token volume and request traffic to this model over time.