Meta AI Won't Fix Your Stack — A First-Principles Review

Meta AI has surpassed one billion monthly users but has structural limitations for developers, including no persistent memory, no document analysis, no external integrations, and no assistant API. Its next frontier model (Avocado) was delayed to at least May 2026, and Llama 4 Maverick scores only 40% on LiveCodeBench versus 85% for GPT-5. The primary viable use case is for Meta advertisers via the Business Assistant tool.