OpenAI unveils GPT-5.3 Instant: Smarter, smoother, more accurate AI conversations

• OpenAI launches GPT-5.3 Instant, an update for ChatGPT, focusing on improved AI responses.
• Key enhancements include fewer refusals, better factual accuracy, and more concise, useful answers.
• The model offers improved judgment, direct responses, and a more natural conversational tone.
• GPT-5.3 Instant provides better web-based answers by synthesizing information effectively.
• Hallucination rates dropped significantly (26.8% with web, 19.7% internal); available March 3, 2026.