Hi team, I’m hitting sustained 503 UNAVAILABLE errors on the Gemini Developer API in production. Priority tier is enabled, billing is Tier 2 (paid), and RPM/TPM quotas are not being exceeded. The model never accepts the request — failures happen at HTTP level before any streamed response. Environm…

[image] I am also getting a lot of 503 error. I am using this api to generate Quizzes.

I am seeing the same issue with gemini-3.7-flash, and I ran a long retry test to see how long it would take before a request eventually succeeded. My workload is a receipt-processing application written in Python using the google-genai SDK. It uploads a PDF containing multiple Japanese receipts and…

Update to my previous report: I continued the same retry test after my previous post, without changing the model, retry interval, or fallback behavior. The second verification pass eventually succeeded, but only after an extremely long series of HTTP 503 responses: Model: gemini-3.7-flash Same G…

I’m having like 99% 503 code fail rate, the service is unavaiable all day long, for over a week now. I need to switch models and even those models fail from time to time as well. [image]

Yup, same here. around 6pm onwards (Malaysia time), keep prompt 503 & 504 error, 0% processed. Anyway, will continue trying tomorrow.

Hey, i believe that this is the issue: [image] Gemini 503 for Prepay clients! - HELP Gemini API Overview Contiki’s AI service is built on top of Gemini, clients setup a google account and using googles AI studio generate a API key linked to their billing. We …

Hello Daniel, im not in prepay.

wow ok, this ruins all of my case i spoke to a few google people and the told me that this is a possible case and that this is not a radical assumption and google had issues with prepay in other services when did you create your account? and do you use the default gemini cloud?

My account is from 2019 i think, and yes im using cloud. To be honest i just think Google is out of capacity…

@Pau_Marin No, well maybe they do have some issue but i have 30 keys running without issue 24 7 and the only time the has a 503 was a few months ago for a few hours we have another 15 keys that just dont work, they get the 503 on every request these crashes can last weeks until they finally sta…

Persistent 503 on gemini-3.7-flash with Priority tier (Tier 2 paid) — 0% success over multiple retries

Gemini API

daniel_lublinsky August 31, 2026, 5:39pm 15

Hey, i believe that this is the issue:

@Pau_Marin can you confirm you use Prepay?

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Persistent 503 on gemini-3.7-flash with Priority tier (Tier 2 paid) — 0% success over multiple retries

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