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etermtoday at 1:47 PM3 repliesview on HN

It'd be ironic if the "Opus 5 nerf" effect is from telling Opus that it sits a tier down from Fable and Mythos, while Opus4.8 believed it was the best of the best, just a note that it was "Preceded by Mythos".


Replies

toshtoday at 2:40 PM

i'd not be surprised if the current system prompt negatively affects performance

at the least it takes away thousands of tokens in the most important part of the context window (!)

also see the comment by comboy on contradictions not helping performance

the system prompt is the most important part of the instruction you can give the model

it comes before everything else + the model is trained to pay extra attention to it

edit: that's also why in smol (minimalist agent harness) there currently is no system prompt at all (you can add one easily if you want to though)

https://github.com/smol-env/smol

the context window is precious

it should be filled with your task and helpful context for that task

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mcbuildertoday at 1:57 PM

Nah, that's the same sort of thinking that makes people type "make no mistakes", I don't make my model roll play, etc. I believe that the longer the system prompt and the more you cram in it the worse the model does. You need the human doing minimal prompts, but in the right direction. Take a look a the transcripts of Terrance Tao with ChatGPT

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KellyCriteriontoday at 2:17 PM

Curious:

Cant it spin up a webbrowser in the background and go to claude.ai and play with the sibling models and "find out" about it rank? :-D

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