Comment by smcleod

GPT 4o and 4.1 are both pretty terrible for coding to be honest, try Sonnet 3.7 in Cline (VSCode extension).

LLMs don't have up to date knowledge of packages by themselves that's a bit like buying a book and expecting it to have up to date world knowledge, you need to supplement / connect it to a data source (e.g. web search, documentation and package version search etc.).