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

180 points | by jameslk 3 hours ago

30 comments

  • richrichardsson 1 hour 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!

    • eitally 7 minutes 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 52 minutes 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!

      • bonoboTP 20 minutes ago
        It's no wtf. Google is an ad company so they want all your data to target ads at you.
  • devsda 44 minutes 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 1 hour 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 12 minutes 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 23 minutes 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.
    • jameslk 1 hour 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.

  • rdtsc 6 minutes 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.
  • 233mhz 2 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
    • usern20260720 2 hours ago
      every thing you read, every keycap you press. Every mail you read, every call you make, permanently recording you
    • nicce 2 hours ago
      OpenAI chat sends everything when you type. Better edit the prompt elsewhere.
      • finger 1 hour ago
        Even before pressing enter? What would be the reason for that? Faster responses?
        • nicce 1 hour ago
          Predicting autocomplete for the prompt. They do suggest the remaining of the prompt. Not sure if that is the main purpose.
          • dgellow 52 minutes ago
            And just general tracking/analytics
    • dgellow 53 minutes ago
      It’s a terrible way to live. We built and are building such an anti-human society
  • jwr 1 hour 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 2 minutes 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 the sports team 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 use the product so you're likelier to see ads that are based on your search.

      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're looking to spend money is finding a willing seller who has compelling terms, via an ad so bad?) _But ad revenue is mostly downstream of users being satisfied with the core product_, whatever that is. (Search, Maps, AI chat, etc)

      (Bonus. My Search pro tip for 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.)

    • dgellow 50 minutes 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
  • ConfusedDog 13 minutes ago
    Use a self-hosted chat app with paid-tier of API tokens.
  • Tryvrsakjo10 51 minutes 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.
  • 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.

  • icantevenhold 2 hours ago
    I assume that everyone does this no matter what they say. Seems like too juicy a target
    • 2III7 2 hours ago
      Obviously anthropic are doing this. Hence their "don't insult Claude too much" policy.
  • frevib 1 hour 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.
  • avereveard 1 hour ago
    Jokes on them all my gemini chat are youtube link I want a summary of
    • puttycat 58 minutes ago
      Joke on them all my Gemini chats are low-value questions I don't want to spend Claude tokens on
  • croisillon 2 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 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.
  • whycome 1 hour ago
    It's just keeping track of all the times you were mean
  • hosteur 1 hour ago
    Never trust google.
  • EbNar 1 hour 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 2 hours ago
    It might matter if Gemini was good enough to use but its not - I only use ChatGPT and Claude.
    • Haven880 1 hour ago
      Their recent Argon is weak as well. But then they promise Carbon going to be world changing. Yeah sure.
    • kuboble 1 hour ago
      For daily chat gemini is great.

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

  • Zeruxe 1 hour ago
    Scary!
  • jbrooks84 1 hour ago
    Every AI trains on the input given to it
    • Havoc 1 hour ago
      This is false.

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

  • StanislavPetrov 2 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 2 hours 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 55 minutes ago
    [flagged]
  • cooluser 23 minutes ago
    [dead]
  • nyxthreepi 3 minutes ago
    [flagged]
  • squidmaster 2 hours ago
    [dead]
  • Haven880 1 hour 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 1 hour 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?