# OpenAI Unveils GPT-5.5 Instant with Improved Accuracy and Personalization

OpenAI announced GPT-5.5 Instant, the new default model powering ChatGPT, promising significant improvements in intelligence, accuracy, and user customization.

The update addresses one of AI's most persistent challenges: hallucinations, where models generate false or misleading information. According to OpenAI's announcement, GPT-5.5 Instant delivers "smarter, more accurate answers" with reduced instances of these fabricated responses.

Beyond accuracy improvements, the new model introduces enhanced personalization controls, allowing users to better tailor ChatGPT's responses to their specific needs and preferences. OpenAI describes the output as "clearer," suggesting improvements in how the model communicates complex information.

As the default model, GPT-5.5 Instant will be available to all Chat