[bachmeier]

I'd be curious if any of your customers have tried 3.1 Flash Lite. It's cheaper than 2.5 Flash, and in my experience with the free tier, quite an upgrade in terms of quality of response. My suspicion is that Google is killing off the old models because they aren't a good value for the customer or for themselves.

[hobofan]

Most of them are using it for data extraction use-cases on complex where they are already in a tricky cost vs. quality compromise. Some of them have evaluated 3.1 Flash Lite but for all of them it performed worse than 2.5 Flash and below requirement.

The only ones I've seen switch to 3.1 Flash Lite were from 2.5 Flash Lite, and all for the most simple use cases, e.g. small UX enhancements.