More expensive in what? The GPUs to run them on are certainly exorbitantly expensive in dollars, but ChatGPT-4 viewing CSAM and violent depraved videos doesn't get tired or need to go to therapy. It's not a human that's going to lose their shit because they watched a person hit a kitten with a hammer for fun in order to moderate it away, so in terms of human cost, it seems quite cheap!

They're Facebook; they have their own LLMs. This is definitely a great first line of review. Then they can manually scrutinize the edge cases.

Using Llama Guard as a first pass screen and then passing on material needing more comprehensive review to a more capable model (or human reviewer, or a mix) seems more likely ti be useful and efficient than using a heavyweight model as the primary moderation tool.

How? I thought we all agreed AI was cheaper than humans (accuracy notwithstanding), otherwise why would everyone be afraid AI is going to take their jobs?