$200/month seems to be psychological pricing to imply superior quality. In a blind test, most would be hard-pressed to distinguish the results from other LLMs. For those that think $200/month is a good deal, why not $500/mo or $1000/mo?
I'll bite and say I'd evaluate the output at all those price points. $1k/mo is heading into "outsourced employee" territory, and my requirements for quality ratchet up quite a lot somewhere in that price range.
A super/magical LLM could definitely be worth $1k/mo, but only if there isn't another equivalent LLM for $20/mo. I'll need to see some pretty convincing evidence that ChatGPT Pro is doing things that Gemini Advanced can't.