Last time I used GPT-4.5 to analyze blood results it gave different output if I uploaded it as 2 instead of 3 separated CSV files. It was both amazing experien

Last time I used GPT-4.5 to analyze blood results it gave different output if I uploaded it as 2 instead of 3 separated CSV files. It was both amazing experience: clear and easy to understand statements, and list of most common causes. And terrifying: "What about X?", "You ar absolutely right, there where X results included, disregard everything I wrote above, here is the new analysis". So for me non-deterministic means unpredictable. Yes, there was nothing random or non-deterministic in that case, I could repeat both scenarios multiple times and get same results again. But the result is affected by something I didn't expect to matter. That damages the trust in tool, no matter how we call it.