New Delhi, Dec. 21 -- OpenAI chief executive Sam Altman has given ChatGPT users an unexpected Christmas treat, hinting at a hidden festive feature that turns a simple emoji into a personalised video experience.

On Saturday, Altman posted a cryptic message on X, prompting users to experiment with ChatGPT using just one emoji. The post quickly caught attention, with users discovering that sending a gift emoji unlocks a special Christmas-themed interaction.

When users prompt ChatGPT with the �� emoji, the chatbot responds by asking them to upload or take a selfie. Once this step is completed, ChatGPT passes the request to Sora, OpenAI's video generation tool.

Sora then creates a short, personalised Christmas video. The conte...