ChatGPT-maker OpenAI has launched a new update for its chatbot, GPT-5.3 Instant. OpenAI has said GPT-5.3 Instant delivers more factual responses and has reduced hallucinations across a wide range of topics as compared to previous models. The company adds that the GPT‑5.3 Instant is a strong writing partner and can move between expressive writing and practical tasks without losing clarity.