Meta has unveiled its final major AI update of the year, introducing the Llama 3.3 AI model.The Llama 3.3 model promises enhanced efficiency, approaching the performance of the larger model at a lower computational cost.Meta's Llama system is widely adopted and has been downloaded over 650 million times.Meta CEO Mark Zuckerberg emphasizes their commitment to open-source development and their intentions in virtual reality and artificial intelligence.