Same here @DaveFL, it appears they removed it.
I ran Aider benchmarks on Rust yesterday comparing exp to preview and was disappointed to say the least. This morning on a tip I just ran the same set of benchmarks using a temperature of 0.5 and the differences are quite large. Preview shows to be performing very well with this adjustment.
I hadn’t noticed a change until yesterday using https://gemini.google.com/app but the switch finally happened and the difference in model output and general ability is drastic and noticeable. I hadn’t had a single hallucination with 03-25 and its ability to generate functional code was top-of-the-line.
The latest version is abysmal compared to 03-25 and absolutely unusable. I attempted to get it to write a simple Dockerfile to install Tailscale and establish a TCP connection to another Docker container and it entirely failed at this. I did not realize the model had changed (so this was a completely blinded test) and it could not make a working version of this file to save its life. It was riddled with hallucinations and did not bother to look through my actual codebase.
At one point, it suggested that I go back and retry a bash script that it generated that I assured it multiple times did not work. I wholeheartedly believe 2.5 Pro 03-25 is revolutionary and will completely change the way SWE and coding teams operate, but this new version is not the same at all.