503 request errors in the Gemini 3.5 Flash API

Hello, I am opening this thread to report many request errors that my SaaS customers are complaining about in the Gemini 3.5 Flash API. Currently, it is throwing several 503 request errors on Aron elite v1. Since I am using billing, there are two where the error is constant and appears simultaneously—this request error in the Gemini API.

Hello @Werlisson_Carvalho ,
503 errors are due to our services being temporarily overloaded. Please see this pinned post for suggestions on how to handle this.

Mine is currently throwing a lot of errors all the time.

I’m thinking about migrating from 3.5 flash to 3.6 flash, but will there be a lot of errors?

Hi @Werlisson_Carvalho ,
503 errors are usually intermittent. Please try again and let us know if you are still facing them (along with the gcp project id and if you are logging it, do share the percentage of requests for which you are getting 503). We have no reason to believe 503 error rates will be any different between the two models.