Meta’s recent cadence of Muse Spark model releases, including Muse Spark 1.3 on September 2 and ongoing benchmark gains on BenchAlign and related leaderboards, has driven overwhelming trader consensus that the company will finish September as the clear #2 AI lab. Its combination of proprietary frontier models, continued Llama open-weight momentum, and integration across one billion monthly users in Meta’s apps creates distribution and adoption advantages that outpace most competitors in practical deployment metrics. While OpenAI and Anthropic hold the top overall benchmark positions, Meta’s pace of shipping, agentic product launches such as Muse, and capital expenditure scale reinforce the 99% implied probability. A late-month surprise release or major benchmark shift from another lab could still alter the ranking before resolution.