That is true of LLMs, but if you’re looking to replace iTalki, the standard to meet or beat on grammar correctness and explanation is that of a human instructor

That is true of LLMs, but if you’re looking to replace iTalki, the standard to meet or beat on grammar correctness and explanation is that of a human instructor - this is not the type of mistake that my native tutor would make, and if he somehow did, I would find a new tutor that I could be confident is teaching me correct grammar. I certainly don’t point it out to be discouraging - on the contrary, I feel like I am the exact target audience for a product like this and would happily pay for it if it can reach or be near the trustworthiness of a human teacher.