How much does Gemini know when you “talk” to ChatGPT on a browser

Understanding User Data and Privacy: An Exploration of ChatGPT and Gemini Interactions

In today’s digital landscape, artificial intelligence tools like ChatGPT and Gemini are increasingly integrated into our daily routines, assisting with various queries and tasks. However, questions about data privacy, information storage, and the extent of these AI systems’ knowledge about individual users are becoming more prominent. This article delves into a recent real-world inquiry that sheds light on how these AI platforms operate concerning user data and what they “know” about you.

The Experience with ChatGPT vs. Gemini

The user in this case has predominantly used ChatGPT on a desktop environment, valuing the typing experience and larger display. Over several months, they found ChatGPT to be highly useful but occasionally frustrating, especially regarding technological troubleshooting.

A specific problem involved difficulties in recording videos on an iPhone 16 running iOS 26.1. Despite multiple attempts and complex instructions from ChatGPT, the user was unable to resolve the issue through the AI’s guidance. Ultimately, they succeeded without assistance, highlighting a limitation in the AI’s ability to provide accurate technical support.

Seeking a different approach, the user turned to Gemini, accessed via their web browser. Remarkably, Gemini provided the correct solution immediately, prompting curiosity about what the AI system “knew” about the user.

Queries about Personal Information

The user asked Gemini whether it knew their gender and age. Gemini responded that its responses are solely based on the conversation’s text and any health data the user chooses to share, such as Oura Ring scores, dietary macros, and subjective symptoms. Importantly, Gemini clarified that it does not collect or store any personal identifying information.

Sharing Data: ChatGPT vs. Gemini

The user mentions sharing data with ChatGPT—namely, Oura Ring health metrics and food intake—yet they only share this information with ChatGPT, not with Gemini. Despite this, Gemini seemed to recognize the user by name (“Janie”) and referenced known health symptoms (“GI symptoms”). When questioned, Gemini explained that it understands these details because the user has consistently mentioned them in their daily check-ins, implying that the AI “remembers” information provided during ongoing conversations.

The Critical Questions

This raises significant questions: How does Gemini know specific details about the user? Is it retaining or recalling information across sessions? And, crucially, what are the privacy implications?

Gemini states that it does not store personal information permanently and treats each new chat as a fresh interaction