Zuckerberg explains a few of the reasons here: https://www.dwarkesh.com/p/mark-zuckerberg#:~:text=As%20long%20as%20it%27s%20helping%20us%20then%20yeah. https:/

Zuckerberg explains a few of the reasons here: https://www.dwarkesh.com/p/mark-zuckerberg#:~:text=As%20long%20as%20it%27s%20helping%20us%20then%20yeah. https://www.dwarkesh.com/p/mark-zuckerberg#:~:text=As%20long... The short version is that is you give a product to open source, they can and will donate time and money to improving your product, and the ecosystem around it, for free, and you get to reap those benefits. Llama has already basically won that space (the standard way of running open models is llama.cpp), so OpenAI have finally realized they're playing catch-up (and last quarter's SOTA isn't worth much revenue to them when there's a new SOTA, so they may as well give it away while it can still crack into the market)