OpenAI releases new GPT-5.3 Instant model late at night! Hallucination rate drops by 27%.

OpenAI officially released the GPT-5.3 Instant model, optimizing it to address user feedback regarding its "overly conservative and didactic" nature. The new model provides more direct and impactful answers, reducing lengthy and restrictive explanations and refusal to answer. The hallucination rate is reduced by 26.8% in online mode and by 19.7% in offline mode.