Mark Zuckerberg

American entrepreneur, co-founder (2004) and chief executive of Facebook, renamed Meta Platforms in 2021, who made Meta a major, often contrarian force in AI. In 2013 he hired Yann LeCunYann LeCun, prop. n.: A French-American computer scientist who pioneered the neural networks that recognize images, led Meta's AI research for over a decade, and argues that chatbots alone will not reach human-level AI. to found Facebook AI Research, which went on to create the PyTorchPyTorch, prop. n.: The most widely used free software toolkit for building and training neural networks, especially in research; programmers write ordinary Python and it handles the calculus and the graphics chips. framework. From 2023 Meta released its LlamaLlama, prop. n.: A family of AI language models from Meta, first released in 2023, whose trained settings can be downloaded and run by anyone, making them the foundation for thousands of other AI projects. language modelslarge language model, n.: A computer program trained on enormous amounts of text to predict the words that come next. At vast scale, that simple skill lets it chat, answer questions, translate, summarize and write code. with downloadable weights, from Llama 2 (July 2023) under a license permitting most commercial use; in 2024 Zuckerberg argued in an open letter that open-weightopen-weight model, n.: An AI model whose trained internal numbers are published for anyone to download and run on their own computers, even if the data and code used to make it stay private. AI is safer and better for innovation than closed models. After the poorly received Llama 4 (April 2025), Meta bought 49 percent of Scale AIScale AI, prop. n.: A company that pays large numbers of people to label examples, write model answers and grade chatbot replies, producing the data AI developers train and test on. Meta bought nearly half of it in 2025., made its founder Alexandr WangAlexandr Wang, prop. n.: An American entrepreneur who founded Scale AI, a major supplier of human-labeled data for training AI, and became Meta's chief AI officer in 2025. chief AI officer and created Meta Superintelligence LabsMeta Superintelligence Labs, prop. n.: A division Meta created in 2025 to pursue superintelligence, gathering all of the company's AI teams under new leaders recruited in an expensive hiring campaign. (June 2025), recruiting from rival labs with exceptionally large offers. His July 2025 letter on personal superintelligencepersonal superintelligence, n.: Mark Zuckerberg's term for a future AI far smarter than people that would serve each person as their own helper, rather than one central system doing everyone's work. set out the lab's goal and signaled more caution about open-sourcing Meta's most capable models.