gemini 3 flash always shows 0 cached input for me

hey everyone

just wondering if anyone else is seeing this with gemini 3 flash

i care a lot about prompt caching because with DeepSeek and mimo and a few other models i usually get around 85 to 90 percent cached input on long ongoing conversations sometimes even higher

but with gemini 3 flash i almost always see cached input at 0 even when i'm sending the same conversation with only a new message added

is anyone else seeing the same thing or is this just happening on my side

i'm curious whether it's expected behavior or if there's something i'm missing