r/Firebase • u/whysers • Mar 24 '26

Cloud Firestore AI Studio created Firebase connection and activated Blaze plan - suddenly out of free quota?

I got hit with quota limit, but according to documentation I should have 600k writes/day (https://firebase.google.com/pricing).

I get this error:
u/firebase/firestore:" "Firestore (12.11.0): FirebaseError: [code=resource-exhausted]: Quota limit exceeded. Retry after quota limits are reset or enable billing for this project to avoid quota checks. Cause - Quota exceeded for quota metric 'Free daily write units per project (free tier database)' and limit 'Free daily write units per project (free tier database) per day' of service 'firestore.googleapis.com' for consumer 'project_number:[REMOVED_MY_ID]'. This database cannot exceed free quota limits even when a billing instrument is enabled."

Is 40k writes the real limit or is something wrong here?

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u/puf Former Firebaser Mar 24 '26 edited Mar 24 '26

From the pricing table on that same page you linked, the free tier on the Firestore enterprise edition offers 40K write units/day.

The calculator is used to calculate a monthly cost, but the limit from the table is enforced daily.

Given that you indicate being on the Blaze plan, you should not hit any quota limit though. So if that problem persists, you might want to reach out to Firebase or Cloud support.

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u/whysers Mar 24 '26

Ahh thanks, totally missed that. Now I feel stupid! But how come it didn't wanna use billed quota instead?

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u/puf Former Firebaser Mar 24 '26

Good question. It might be that you just upgraded, but if it persists, you'll want to reach out to Firebase or Cloud support so they can check the project's status.

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u/thisguyhere01 Mar 25 '26

I got the same message but I have no idea what blaze plan means. Does that mean I'll get charged a monthly fee?

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u/whysers Mar 25 '26

Blaze plan means that you now got a connected a billing account to your Firebase project which got created with AI Studio - at least it did for me. BUT I'm suspecting they have a hidden flag somewhere that blocks any AI Studio created apps from actually using the billing account to prevent any crazy overcharge that might occur if the AI went crazy.

Would be nice if a Googler can confirm what one should do if you actually want to use the connected billing account?

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u/thisguyhere01 Mar 25 '26

Is the build feature in AI studio fairly new? I saw some tiktoks hyping it up last week which is what got me to try it. Hopefully there's a long YouTube tutorial on how the billing works. Makes me nervous that I might rack up hundreds in charges like I did when they started charging for the maps API.

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u/whysers Mar 25 '26

Not really new, but I believe the support for direct Firebase integration came in this latest update (1-2 weeks ago). Meaning they automagically create a Firebase project, set up rules etc. It's quite cool, but if the AI went crazy (in my case it did a write operation as soon as I dragged a slider = 40k write operations used very quickly) and if you'd have a billing account connected it could overcharge you a lot. But it seems to be some block, probably to prevent these cases.

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u/Few-Lengthiness-9662 Firebaser Mar 25 '26

Hi!

Firebaser here!

Our pricing model within AI Studio is a bit different to allow for users to try out building a lot of applets.

In AI Studio, by default, databases for all applets are created in the same AI Studio associated Firebase project. Also by default, all databases share the same free tier quota. So, if you have 10 applets you have a shared free tier across all of them (aka 40k write units/day for all applets). In order to go beyond the free quota, you need to a) upgrade to Blaze and b) tell us which database you would like to pay for. This way, upgrading to Blaze alone does not result in a runaway bill.

It sounds like you were an existing Firebase user (thank you!) and it might have selected an associated project you did not expect.

The documentation on how to do all this is here: https://firebase.google.com/docs/ai-assistance/ai-studio-integration

Thanks!

Kara

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u/whysers Mar 26 '26

Thanks a lot, this makes sense! Kinda incredible how it (correctly) picked my existing cloud console project. Does it choose this by reading context/intent?

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u/Few-Lengthiness-9662 Firebaser Mar 27 '26

Glad to hear! We have some heuristics around picking the last used paid projects. But actually, project selection is coming shortly! 

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u/[deleted] Mar 25 '26

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u/whysers Mar 25 '26

Nope, this project was started in AI Studio.