Andreessen Horowitz has unveiled a massive Nvidia H100 GPU cluster named 'Oxygen' to assist its AI startup portfolio in meeting compute demands. This initiative allows startups to train AI models without the typical high costs associated with GPU access, leveling the playing field against tech giants like Google and Microsoft. The program addresses a critical supply crunch, providing flexibility and reducing pressure on startups to secure funding for expensive GPUs. A16Z aims to enhance its appeal to new startups by offering this essential infrastructure in exchange for equity stakes.