Depends what they mean. Generate working code all the time or after going a few iterations of trying and promoting? It can very easily happen, that an LLM generates something that is a straight error, because it hallucinates some keyword argument or something like that, which doesn't actually exist. Only happened to me yesterday. So going from that, no, they are still not able to generate working code all the time. Especially, when the basis is a shoddy-made library itself, that is simply missing something required.