OpenAI upgrades GPT-5.5 Instant for better understanding and reliability

OpenAI announced an upgrade to GPT-5.5 Instant today. The new version is better at understanding user intent and handling complex tasks reliably. Launched in May, the model already cut hallucinations by 52.5% on high-risk topics like medicine and law, and improved math and science reasoning.

The upgraded model handles complex constraints more steadily, making shopping and local recommendations more practical and coherent. Paid users get access today, free users tomorrow.