OpenAI has announced a significant update to ChatGPT, integrating GPT-5.3 Instant as the default model. This upgrade aims to reduce overly cautious refusals and unnecessary disclaimers, delivering more accurate responses with fewer hallucinations.
The company stated the update prioritizes tone, relevance, and conversational flow, directly addressing user feedback that earlier versions felt too "stiff" and overbearing. GPT-5.3 Instant is designed to provide more direct answers without lengthy safety preambles.
Testing indicates GPT-5.3 Instant shows a marked improvement in factual reliability, with hallucinations declining by approximately 27% when using web data and 20% when relying solely on its training data. The model also demonstrates enhanced creative writing capabilities.
GPT-5.3 Instant replaces GPT-5.2 Instant as the default for all ChatGPT users, while the previous model remains accessible for paid subscribers under legacy options.