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

308 points | by jameslk 4 hours ago

40 comments

  • giwook 12 minutes ago
    Is this really surprising to anyone?

    I just sorta assumed that Google was hoovering up anything I type into its AI and don't tell it anything too personal or sensitive.

    Is anyone under the illusion that our data is not being collected, whether it's Google or literally even the seemingly innocuous TVs in our home that have been found to be spying on us 24/7?

  • richrichardsson 3 hours 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!

    • devsda 2 hours ago
      This was the case with Google Assistant too.

      Google has this pattern of all or nothing approach.

      Maps refuses to show your *current* location if you don't enable location accuracy i.e. if you won't allow it to spy on your WiFi or Bluetooth it refuses to show your current location at all. GPS, what's that?

      We can disable notifications and even phone access but physical activity is the one permission that cannot be disabled for play services !?

      Google apps have a lot of WTFs!

      • BoppreH 17 minutes ago
        And the YouTube home page is blank if you have Watch History off. The recommendation algorithm still runs on the side bar of any video you watch, but the home page refuses to even show your subscriptions.
        • ACCount39 11 minutes ago
          Yeah, this is just Google punishing people for not enabling their data harvesting.

          There's no reason they can't have a mix of "this is popular in general" and "your subs and likes suggest you'd like this" on the front page - they just don't want people to disable watch history. They are required to offer that as an option, but they'll never stop pestering you about it.

        • SoftTalker 9 minutes ago
          That could be seen as a feature.
      • bonoboTP 1 hour ago
        It's no wtf. Google is an ad company so they want all your data to target ads at you.
        • WarmWash 12 minutes ago
          People use Google everyday, block all ads, get extremely angry about Google's grubby advertising hands, and then when you tell them their are paid services like Kagi and Proton...."pay for this stuff? Nah, I have a right to it for free!"
        • amelius 42 minutes ago
          Yes, it's almost like a fairy tale where children are offered candy but then very bad things happen. Hansel und Gretel, etc. We should have known all along!
          • wingmanjd 19 minutes ago
            Continuing with your Hansel and Gretel metaphor, the first time the candy turned sour for me was Goog-411. It was a service (at least over here in the US) that allowed you to look up local businesses via voice prompts over a phone call. When the service was still active, calling 411 via a mobile phone had a per-call cost, so a free lookup service seemed great.

            I found out later that Goog411 was created to primarily train on the voice prompts from the users of the service. Left a really bad taste.

      • WmWsjA6B29B4nfk 1 hour ago
        I've just turned off location accuracy, google maps displayed a popup said results will be better if I turn it on, and after dismissing the popup it did use GPS to localize me with no issues.
        • indigo945 53 minutes ago
          This will only work for a few weeks, after which the location will be missing entirely. (Which just makes it more obvious that this is an intended feature, not a bug.)
          • WmWsjA6B29B4nfk 14 minutes ago
            If true, what you described makes it sound exactly like a bug, not an intended feature.
        • franktankbank 1 hour ago
          A/B testing rules
      • user_7832 13 minutes ago
        > Google has this pattern of all or nothing approach.

        Call it what it is, please. User-hostile behaviour that compels you to turn their tracking on if you want to use any of the practically helpful services.

        I'm a super privacy conscious person, and even I end up keeping many of these things on simply because I want to use for eg google assistant.

    • elesiuta 28 minutes ago
      This has been annoying me too, and I was getting pretty close to turning on chat history having forgotten why I disabled it.

      Thanks for the reminder OP!

    • kekqqq 1 hour ago
      Yeah, I am hugely annoyed by this. I kept paying for the subscription for a year and a half, but I think I will stop now, as I feel that the added value is very small in comparison to Claude Code or just using openrouter open models.
    • eitally 1 hour ago
      This is a risk issue. They need users to explicitly opt in or they risk user-data-related compliance suits. This has always been Google's problem, as an advertising company, and why they've taken so many seemingly awkward paths over the years with both Android & Cloud.
  • devsda 2 hours ago
    > Please don’t enter confidential information that you wouldn’t want a reviewer to see or Google

    If Gemini has access to app data like gallery, mail etc that can also be subjected to human review? I imagine that will also be part of the context.

    They are vague when they say 'don't enter'. Is it only prompts or does it also cover other data too.

  • viraptor 3 hours 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.

    • swatcoder 1 hour ago
      What you describe is almost certainly what the legal team who drafted the terms and processes had in mind.

      But there's two reasons to bring cautionary attention to it anyway:

      1. As a user, I may not be okay with those terms as they stand and may not have the legal insight to have intuited them. In as much as I have a choice, because of those terms, I may want to use Gemini less/differently or look at other providers that have crafted less shrewd and defensive legalese and processes.

      2. As a executive or manager at Google, whether working directly in feature management, or advertising, or government compliance, these same terms define the framework for anything I want to develop. What "makes sense" from a defensive legal standpoint today can the open door for an exploitative or otherwise unexpected use later.

      I get what you're saying here in terms of plausible or justifiable "innocence", but that probably shouldn't get in the way of some critical personal reflection for users.

    • bonoboTP 1 hour ago
      You cannot opt out, except by using only temporary chats. You cannot keep your chat histories visible to yourself only. If you want to access your previous chats, you cannot opt out of human review and training models on your chats.
    • origini 52 minutes ago
      I disabled it because of the human in the loop.

      Don't care for what, store it away audit save if you have to, talk to laywers in case you need to read through them but don't let random people read my stuff.

      And in this case stuff = AI discussion which feels to me similiar to my google docs documents im hoping/expecting Google also to not read

    • jameslk 3 hours 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’re claiming to use chat transcripts for both training and for human review to improve training, not just for liability.

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

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

      * 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.

    • Roark66 46 minutes ago
      I think such liability as "someone talks to the chatbot, gets wrong reply and poisons themselves" could be disclaimer by such conditions: "Our chat is unsuitable to discuss topics X, Y and Z. If you choose to discuss them anyway you're doing it at your own risk.

      But this would require an admission of limitations of the technology.

      Do people sue Google if search links to a page that has misleading info that results in someone taking a wrong drug? Nope.

      Do we sue the browser maker when the info on a given Web page is malicious? Also no.

      So, I don't understand why we treat chatbot providers any different. Everyone should be expected not to believe a word they say without corroboration.

    • wat10000 8 minutes ago
      They literally say they train on your prompts.
    • TZubiri 1 hour ago
      Azure's OpenAI terms are similar but more explicit with the safety and no-training terms.

      Some chats are saved for 14-30 days IF they trigger a safety classifier, but they are never used to train future models or retained after that period, the objective is to verify safety. Simple as that.

      If you are a business user, like in the case of Azure OpenAI, the analysis and priorities are quite different though, but the mechanism seems to be the same.

  • 233mhz 4 hours 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
    • nicce 3 hours ago
      OpenAI chat sends everything when you type. Better edit the prompt elsewhere.
      • finger 3 hours ago
        Even before pressing enter? What would be the reason for that? Faster responses?
        • nicce 3 hours ago
          Predicting autocomplete for the prompt. They do suggest the remaining of the prompt. Not sure if that is the main purpose.
          • dgellow 2 hours ago
            And just general tracking/analytics
    • usern20260720 3 hours ago
      every thing you read, every keycap you press. Every mail you read, every call you make, permanently recording you
    • dgellow 2 hours ago
      It’s a terrible way to live. We built and are building such an anti-human society
  • hollowturtle 9 minutes ago
    We're out of training data, they need to get fresh data somewhere
  • WarmWash 25 minutes ago
    This shouldn't be surprising at all.

    Anytime you aren't paying full price for something, you are paying the rest with something else. We know the real cost because there is an API that comes with all the confidentiality, and that is much more expensive.

    FYI, this is true for the other labs too.

  • baggachipz 1 hour ago
    Is anyone actually surprised by this? They've devoured the whole internet for training already, the stream of shit coming in from users is the only way to hoover up more training data.
    • TZubiri 1 hour ago
      Yes IF the Terms of Services and UI communicate otherwise. It's not normal for a company like Google to break ToS or Privacy Policy, would be quite novel.
      • baggachipz 1 hour ago
        All they have to do is change it after the fact. The idea that they would self-police is laughable.
        • WarmWash 5 minutes ago
          Can you give an example of when they did this to retroactively shield themselves.

          I don't think people understand that while consumers are dumb, uneducated, and broke, enterprise is a cash cow with a experts and a legal team.

          If you serve them, like Google does on a massive scale, these ToS "gotchas" will do you in faster than you can say "lawsuit".

        • Jensson 1 hour ago
          If they want to do something with your data they just change the terms before they do it, it is so easy and consequence free to legally abuse this that I'm not sure why you think they would do it the illegal way.
          • baggachipz 58 minutes ago
            Public perception. "Look, we care about your privacy! We won't use your data!"

            six months later

            Quietly update the ToS to allow them to retroactively use all of your history and data going forward, attempt to fly under the radar and/or gaslight users that it's always been that way

  • mackwell 53 minutes ago
    And if you do want privacy, and you purchase a workspace business plan instead… well then you have the pleasure of paying more and not having access to the latest models (and having no idea when you might get access to them eventually months later).
  • jwr 2 hours 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.
    • r_klancer 1 hour ago
      I work with user data in Search and this is a common sentiment ... but I think it slightly misstates the purpose of using user data.

      The primary purpose has always been improving search overall -- traditionally this has meant updating query interpretation, ranking, presentation, etc for smaller and smaller query slices ("Ah, when we show the mayor and the population in response to [Barcelona] people just revise their query to [Barcelona FC], so we should make sure to include latest match result on the top. Not so for [New York]."), and running tests on every product change to see what people like. In this case nobody cares about any _individual_ user's data, only the collective. This is basically the original "collective intelligence" contract of PageRank, albeit hillclimbing on billions of searches and clicks instead of using link structure. (Old question: does original PageRank count as machine learning, or not?)

      Second is personalization -- things like "Oh, my flight or my delivery is expected on date X, handy that gmail popped a reminder on my calendar, good work Google." Or searching for a restaurant in Maps and seeing results that are biased towards the kinds of restaurants you already like, that kind of thing.

      When it comes to revenue the purpose of these isn't to target ads, it's just to have you get value from and use the product, and when you are ready to spend money this is where you come to search for the thing, whatever it is.

      Finally there is limited use of a limited set of data for ads relevance. There's higher CPC for ads you might actually be interested in (and if you are looking to spend money, is finding a willing seller who has compelling terms via an ad such a bad thing?) But ad revenue is mostly downstream of users being satisfied with the core product and using it more, whatever that product is. (Search, Maps, AI chat, etc)

      (Bonus. My Search pro tip re: ads is leverage the modern stack and spell out your intent with a few more words when you query. We're pretty good at not serving ads for non-commercial queries. But old-school super short "searchese" queries make it hard to guess whether your intent is commercial or not.)

      • gardnr 17 minutes ago
        Oh, I get it now. The anti-user behaviour is actually there to help me as a user. The main goal isn’t to Hoover up all my data to profile me and serve more targeted ads in more places. The main goal is to make search better. Now I get it.
    • dgellow 2 hours ago
      Would you prefer to not have people discuss the topic, just because you’re already familiar with how evil google is? Lots of younger people didn’t have out experience of seeing companies evolve into the current evil they are, or do not follow the industry
  • cby821555203 29 minutes ago
    In this true age of AI, privacy is virtually non-existent. I now make it a point not to share my secret keys or account information when chatting with Gemini, for fear that such data might be leaked.
    • mark_l_watson 12 minutes ago
      right on. My family shares a Gemini AI Pro account and it is a good service. For financial, medical, and other personal chats, use private AI offerings from Proton Lumo or DuckDuckGo.
  • dzonga 26 minutes ago
    we already knew this - google is gonna google - same way they train on your google photos and emails.
  • rdtsc 1 hour ago
    Is there a way to use an API to export locally all the temporary chats and restore them as temporary chats for the next session? I am sure they’ll disable those eventually too, or even worse block your whole account for misuse.
  • fweimer 3 hours 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.

  • Tryvrsakjo10 2 hours ago
    I know they say not to enter confidential information, but they are basically using the LLM to spy on users it's unfortunate. Even deleting chats doesn't help because they keep that information for another year or 2.
  • avereveard 2 hours ago
    Jokes on them all my gemini chat are youtube link I want a summary of
    • puttycat 2 hours ago
      Joke on them all my Gemini chats are low-value questions I don't want to spend Claude tokens on
  • taspeotis 59 minutes ago
    If it’s not an iPhone it’s … not an iPhone.
  • icantevenhold 4 hours ago
    I assume that everyone does this no matter what they say. Seems like too juicy a target
    • 2III7 3 hours ago
      Obviously anthropic are doing this. Hence their "don't insult Claude too much" policy.
  • ConfusedDog 1 hour ago
    Use a self-hosted chat app with paid-tier of API tokens.
  • frevib 3 hours 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 3 hours 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"
  • realsarm 3 hours ago
    Then people are totally fine puting all sort of private stuff in Notebooklm or Gemini notebook.
  • advenn 3 hours 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.
    • kinj28 1 hour ago
      I don’t use Gemini at all. It also gives me sub optimal experience compared to other personal assistants
  • whycome 3 hours ago
    It's just keeping track of all the times you were mean
  • hosteur 2 hours ago
    Never trust google.
  • EbNar 3 hours 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.
  • wewewedxfgdf 4 hours ago
    It might matter if Gemini was good enough to use but its not - I only use ChatGPT and Claude.
    • Haven880 3 hours ago
      Their recent Argon is weak as well. But then they promise Carbon going to be world changing. Yeah sure.
    • kuboble 3 hours ago
      For daily chat gemini is great.

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

  • tonyhart7 27 minutes ago
    I mean, this is google we talking about

    also the same cases for antrophic and open ai

    why would anyone trust company that literally need data to improve their product ????

  • jbrooks84 3 hours ago
    Every AI trains on the input given to it
    • Havoc 3 hours ago
      This is false.

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

    • wat10000 4 minutes ago
      ZDR policies are a thing. Maybe you can't trust all of them, but when a provider like AWS says it, you can probably believe them. They'd be setting themselves up for an endless stream of massive lawsuits from other large companies if they were lying about it.

      Local models are also a thing. The Qwen 3.8 I'm running on a spare computer is definitely not training on my inputs.

  • Zeruxe 3 hours ago
    Scary!
  • r_lee 4 hours ago
    another Google W I guess? gemini really leading the pack over here
  • ssuunnyy 2 hours ago
    [flagged]
  • magus-stoopr 47 minutes ago
    [dead]
  • cooluser 1 hour ago
    [dead]
  • nyxthreepi 1 hour ago
    [flagged]
  • squidmaster 4 hours ago
    [dead]
  • StanislavPetrov 4 hours ago
    We should all be writing bots that constantly spam all of these so-called AIs with random nonsense to poison the well.
    • Aachen 3 hours ago
      Ah yes, the poison-the-product-you're-trying-to-use strategy
  • Haven880 3 hours 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?
    • WarmWash 15 minutes ago
      The soviet union collected data and profiled American citizens so that they could (potentially) be used as dumb pawns if needed. Dumb pawns that didn't even know that they were doing the bidding of the soviet union.

      Just like how Kim Jong Un killed his brother using dumb pawns to actually carry out the murder.

      So if your head has not grasped this reality, then they are already two steps ahead of your "What could they possibly do".

      This is also the reason why congress keeps banning Chinese enterprise. It's not because they care about privacy, it's because they care about people being turned into pawns.

    • danelski 2 hours 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?