The speaker suspects Anthropic and OpenAI train only on their own harnesses and probably exclude competitors' harnesses from training.

“yeah like most harness choices don't matter because all of these harnesses are the same but i will say like grock bot for example is actually quite different i think from my understanding than than how some of these other harnesses have been designed and i like that a lot um and i think it's clear from here at least that like i'm pretty sure anthropic or open ai are exclusively training”

“on their harnesses they're probably not training on their competitors harness i mean i'd assume not because i don't know why they would do that but”