Tell HN: Gemini trains on chat history, even for subscribers (personal accounts)

If you have a personal Google AI subscription, all your saved chat history in Gemini can be used for training and there is no way to opt out unless you turn off chat history or use temporary chat sessions. These chat transcripts may even be read by human reviewers. Although Google claims to disconnect them from your account when human-reviewed, they explicitly warn not to enter confidential information.

https://support.google.com/gemini/answer/16836988

“[Gemini app activity] is used to improve Google services for everyone, including by training generative AI models, if your Keep Activity setting is on.“

https://support.google.com/gemini/answer/13594961?hl=en#human_review

“A subset of chats are reviewed by human reviewers”

https://support.google.com/gemini/answer/13594961?hl=en#pn_retain_data

“Chats reviewed by human reviewers [...] are not deleted when you delete your activity. Instead, they are retained for up to three years.”

https://support.google.com/gemini/answer/13594961?hl=en#pn_data_usage

“Please don’t enter confidential information that you wouldn’t want a reviewer to see or Google to use to improve our services, including machine-learning technologies.”

To disable their training on your chat sessions, you need to turn off “Keep Activity” in Gemini’s settings. Turning that off means you’ll lose any chat sessions after 72 hours.

I learned this too late, thinking that having a paid subscription = not being turned into the product. Apparently paying is not enough.

Thank you to this user on HN for mentioning in another thread: https://news.ycombinator.com/item?id=50355424

118 points | by jameslk 2 hours ago

23 comments

  • viraptor 58 minutes ago
    I don't trust any of the providers, but at the same time I think you're reading into the terms too much for wrong reasons. Yes, you have to opt out. But:

    > A subset of chats are reviewed by human reviewers

    This is expected these days for threads which may make the provider liable. Just look at the recent death case due to bad GPT medication recommendation.

    > Chats reviewed by human reviewers [...] are not deleted when you delete your activity. Instead, they are retained for up to three years.

    They're being retained for legal purposes.

    > Please don’t enter confidential information...

    This is so they don't accidentally preserve it for review, but also they don't want you to share private info that the agent will post somewhere without an explicit approval.

    Those points make sense for them, regardless what other T&C rules apply.

    • jameslk 45 minutes ago
      > This is expected these days for threads which may make the provider liable. [...]

      > They're being retained for legal purposes.

      It’s a significantly wider usage than that:

      A subset of chats are reviewed by human reviewers (including Google’s trained service providers) to help improve Google services. These include Gemini models, other generative AI models that power Gemini Apps, and technologies that help reduce unintended activations.

      Reviewers assess if Gemini Apps’ responses were low-quality, inaccurate, or harmful. They also suggest better responses. We use their suggestions to help our models respond better in the future.

      That’s in addition to the liability language:

      Chats are also reviewed to keep Gemini safe and secure for everyone and to address violations of the Google Terms of Service, including the Generative AI Prohibited Use Policy. Reviewed chats are retained for up to three years.

      https://support.google.com/gemini/answer/13594961?hl=en#huma...

      Some important things to take away from this:

      * They don’t define “subset”. It could be most chats.

      * They make no promises of anonymizing content, just “disconnecting” it from the account.

      * They’re claiming to use it for both training and for human review.

      * This is happening for free and paid user subscriptions, by default, and the only way to stop it is to turn off chat history altogether.

  • richrichardsson 54 minutes ago
    What's worse is if you have a Pixel phone then Gemini is completely useless without enabling this setting.

    I had it switched off:

    "Hey Google, remind me at 7pm <something>"

    "OK, your reminder is set for 7pm"

    Next day:

    "Hey Google, why didn't you remind me at 7pm"

    "I can't do anything with your phone unless you enable chat history."

    WTAF!

  • 233mhz 1 hour ago
    imho you should act as if everything you type, not even send, is stored forever and might be used for training whenever they decide to retro actively change their TOS, no matter how much money you pay
    • dgellow 1 minute ago
      It’s a terrible way to live. We built and are building such an anti-human society
    • usern20260720 1 hour ago
      every thing you read, every keycap you press. Every mail you read, every call you make, permanently recording you
    • nicce 1 hour ago
      OpenAI chat sends everything when you type. Better edit the prompt elsewhere.
      • finger 53 minutes ago
        Even before pressing enter? What would be the reason for that? Faster responses?
        • nicce 51 minutes ago
          Predicting autocomplete for the prompt. They do suggest the remaining of the prompt. Not sure if that is the main purpose.
  • jwr 36 minutes ago
    I am not sure why anyone expected anything different from Google. This is a company that lives and thrives on user data and tracking users. Users are the material that is being run through this entire huge ad-selling machine.
  • Haven880 40 minutes ago
    This why I advocate Deepseek, GLM, Kimi, Qwen as in hosted directly (send data) to China. Think about it, what can they do worse off than what our own backyard AI can do? There is no privacy advantage in Western AI. It is way more likely ours leak your data to dark web (solid track records for decades) or get law enforcers on you. Meanwhile, am I suppose to be worried, China sending their Ming-like Eastern Bureau to my home in the west? On dark web, aplenty western companies leaks. How frequent the eastern one?
    • danelski 26 minutes ago
      That’s a take I see often, and it always overblows the direct personal threat while understating the more abstract societal one. A Western AI company might report you for plotting a murder or a mass attack, but that’s not the issue for most people. Mass observation of what society thinks deep down and manipulating it with that data is a problem for both, and maybe more so for external actors, since they don’t have even a remote reason to care about your well-being.

      You’d maybe want to counter with something like 'But Google/Amazon/whoever just wants to sell me stuff!'. What makes you think that Chinese B2C would just pass on that opportunity?

  • avereveard 19 minutes ago
    Jokes on them all my gemini chat are youtube link I want a summary of
    • puttycat 5 minutes ago
      Joke on them all my Gemini chats are low-value questions I don't want to spend Claude tokens on
  • fweimer 1 hour ago
    Even if they don't train on your content, Google reserves the right to use it for improving their services in other ways:

    “ This license is for the limited purpose of operating the services, which means allowing the services to work as designed and creating new features and functionalities. ”

    https://policies.google.com/terms?hl=en-US#toc-permission

    The training exclusion has always been a distraction. These service providers have plenty of other uses for your data.

  • frevib 58 minutes ago
    If a company can do something that benefits them, and there is no way the customer can find out or prove that, the company will do it.
  • croisillon 1 hour ago
    training on "no i don't need google search to nurse me after a breakup, i was just asking what movie has the line she just dumped me"
  • icantevenhold 1 hour ago
    I assume that everyone does this no matter what they say. Seems like too juicy a target
    • 2III7 1 hour ago
      Obviously anthropic are doing this. Hence their "don't insult Claude too much" policy.
  • realsarm 1 hour ago
    Then people are totally fine puting all sort of private stuff in Notebooklm or Gemini notebook.
  • advenn 1 hour ago
    that's why i don't use gemini for anything serious or personal. if you want persistant memory you should enable keep activity, but keeping activity allows google to use your chats.
  • hosteur 27 minutes ago
    Never trust google.
  • whycome 1 hour ago
    It's just keeping track of all the times you were mean
  • jbrooks84 56 minutes ago
    Every AI trains on the input given to it
    • Havoc 41 minutes ago
      This is false.

      eg Gemini enterprise has a note under each chat session explicitly saying it’s not used to improve the models

  • EbNar 41 minutes ago
    This is one of the reasons why I unsubscribed from Gemini Pro, apart from the fact that the experience with Gemini has been frankly underwhelming.
  • Zeruxe 48 minutes ago
    Scary!
  • wewewedxfgdf 1 hour ago
    It might matter if Gemini was good enough to use but its not - I only use ChatGPT and Claude.
    • kuboble 1 hour ago
      For daily chat gemini is great.

      actually even gemma locally is great for a lot of chat purposes.

    • Haven880 38 minutes ago
      Their recent Argon is weak as well. But then they promise Carbon going to be world changing. Yeah sure.
  • StanislavPetrov 1 hour ago
    We should all be writing bots that constantly spam all of these so-called AIs with random nonsense to poison the well.
    • Aachen 1 hour ago
      Ah yes, the poison-the-product-you're-trying-to-use strategy
  • r_lee 2 hours ago
    another Google W I guess? gemini really leading the pack over here
  • ssuunnyy 2 minutes ago
    [flagged]
  • squidmaster 1 hour ago
    [dead]