Reading the links posted in a sibling thread it only does it if you have text to speech enabled and they use an anonymizing proxy so openai can't associate sessions with any particular user ie it's not perfectly anonymous and private but I don't see how you could have totally anonymous and private until you have a fully offline on-device TTS model, which the fairphone guy said they tried and didn't feel it was up to scratch.

I don't use e/os but it doesnt' seem like a terrible compromise to me personally.