The first thing I think and my friends think when trying to learn from AI is that it is fallible. ie it makes mistakes and the student has no way of knowing its wrong. GPT 3.5 made grammar mistakes when explaining simple Japanese sentences to me in English. even the CEO of Duolingo said that AI will have "small hits to quality" https://www.linkedin.com/posts/duolingo_below-is-an-all-hand... and my housemate said that the japanese he gets from ChatGPT 4o is awkward. (I told him to prompt it in Japanese instead of English and he said the result was a lot better)

If trying to learn a language with only audio I recommend an AI-free audio podcast https://coffeebreaklanguages.com/coffeebreakspanish/