OpenAI has made GPT-5.3 Instant the default model for ChatGPT, aiming to lessen the lengthy safety warnings and refusals that users often find irritating. The upgrade is designed to deliver more direct answers while keeping core safety restrictions intact. OpenAI also says the new model reduces hallucinations—about 27% fewer when researching online and 20% fewer without web access. Paid subscribers will still be able to use the previous GPT-5.2 Instant model, but most users will experience the smoother, more conversational tone of GPT-5.3 Instant. Read more →