Geoffrey Fowler

Starbucks tracked my every purchase — then gave me fewer deals. It’s called surveillance pricing.

OpenAI’s Atlas promises AI-powered convenience. The price? Letting ChatGPT track and store “memories” of what you do online.

Asking a doctor to review 12 real examples of ChatGPT giving health advice revealed patterns that can help you get more out of the AI chatbot.

Here’s why prices differ for the same rides and what you should do every time you book an Uber or Lyft.

Tap through our test to see which AI tool generated the best images according to our judges: an artist, a Pulitzer-winning photographer and a photo-retouching master.

A clickable guide to fixing the complicated privacy settings from ChatGPT, Claude, Copilot, Gemini and Meta AI.

When I want help from AI, ChatGPT is no longer my default first stop.

I gave the new ChatGPT Health access to 29 million steps and 6 million heartbeat measurements. It drew questionable conclusions that changed each time I asked.

What’s good – and scary – about Gemini’s new Personal Intelligence.

Researchers uncovered hidden biases in ChatGPT’s assessment of people from different places. See how the chatbot ranked your city, state or country.