My best results are with gemini-3-flash-preview when "thinkingBudget" : 0. Newer models are worse

My evaluation covers extracting data from around 20 pdf documents.

Using the more up to date thinkingLevel: minimal gives me a 6-20% degradation in accuracy, depending on the model. Newer models are affected more than older models.

(thinkingBudget is not available on newer models)

So, I am deadly worried that gemini-3-flash-preview will not be available one day.