As someone who has been running Gemini models in production for a year, recently (last 2 months), I have been actively moving away from it.

The primary reason for me has been that Google autonomously decides to downgrade usage tiers and then upgrade them again - and does this incorrectly.

Over the last week itself, in the span of two days, our account for first downgraded and then upgraded. This is despite matching the criteria to remain at the tier we operate at throughout.

Google Support (when you finally get to a human) has accepted that these are potentially bugs, but the first time it happened, we were rate limited so severely for ~4 hours that I find it really difficult to continue trusting Google.