March 4, 2026

GPT-5.3 Instant cuts hallucinations by 26.8% as OpenAI shifts focus from speed to accuracy

brown wooden 9-piece office table and chairs — S O C I A L . C U T / Unsplash

OpenAI's GPT-5.3 Instant — the company's most widely used model — reduces hallucinations by up to 26.8% compared to its predecessor, prioritizing accuracy and conversational reliability over raw performance gains, OpenAI says.GPT-5.3 Instan...