It seems use 60 sec GPU quota instead of real time usage?

Hmm… In that case, it’s likely due to the changes described in the post below. Free Account ZeroGPU Quota Issue Beginners > Recently, a limit was introduced on how many times free users can run ZeroGPU Spaces per day. There was an issue where hitting that run limit would return the same error as the quota limit, and this seems to be what is causing the error you are seeing. The fix has already been implemented internally, but it’s not yet been fully deployed. As a result, users may still continue to see the same error for now.