Personally, I have not seen anything from him that is meaningful. OpenAI and Anthropic (itself started by former OpenAI people) of course have built their models without LeCun’s contributions. And for a few years now, LeCun has been giving the same talk anywhere he makes appearances, saying that large language models are a dead end and that other approaches like his JEPA architecture are the future. Meanwhile current LLM architecture has continued to evolve and become very useful. As for the misuse of the term “open source”, I think that really began once he was at Meta, and is a way to use his fame to market Llama and help Meta not look irrelevant.