GPT-5.5: Mythos-Like Hacking, Open to All

nsingh2

These plots are terrible. Why is categorical data connected across categories with lines? Why not just use bar plots? Like in the "Web Vulns in OSS" plot, white box data for Opus 4.7 is not available, but the absurd linear interpolation across categories implies it should be near 60.

strange_quark

Wasn't it already confirmed that small open-weight models were able to detect most of the same headline vulns as mythos? How is this any different?

mertcikla

why does this read like an openai ad?

WhiteDawn

First you need to get through the safety net. I’ve had many productive gpt5.4 sessions hit a roadblock of “ethicality” and pollute the context with multiple rounds of trying to convince it to continue

JellyYelly

They say its mythos like, without actually comparing it to Mythos (fair enough, it's not public) but the bar for a model to be mythos-like has to be that you can produce as many novel and high severity security vulns outlined in the Mythos redteam blog. I haven't seen any other lab produce a report like that yet. The proof is in the pudding.