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armcat • yesterday at 12:56 PM • 3 replies • view on HN

I put Decisions API against classic statistics experiments: (1) loaded coin, and (2) marble selection from a jar, with replacement. I tested both predicate and choice questions. I ran thousand trials against each experiment, and I also did an experiment where I change the order of choices, to see if it matters. Summary:

* Using predicate questions gave nearly perfect/expected probability outcomes

* Asking it to choose an outcome behaved differently from drawing randomly - if the true probability of a red marble draw was 50%, using Decisions API produced 86%, i.e. it picked the right marble but gave a significantly more biased weight on its choice

* Changing the choice order changes the probabilities! Moving the red marble from first to last choice changed its probability estimate from 86% to 73%


Replies

ranyume • yesterday at 1:06 PM

> * Changing the choice order changes the probabilities! Moving the red marble from first to last choice changed its probability estimate from 86% to 73%

These models seem to have the same biases and limitations of LLMs minus speed. Outputs and inputs should be treated the same way as LLM prompts.

ahknight • yesterday at 3:08 PM

It's still a predictive model under the hood, so order will always matter. They are also just as open to prompt injection and bias/loaded questions as the underlying model.

chrisweekly • yesterday at 2:32 PM

I wonder if a better model (and/or higher effort level) than GPT-6-Luna would produce a different result.