The most downloaded model on Hugging Face is not a chatbot but a 22.7 million parameter English embedding model, recording 255 million downloads as of 3 August 2026, while the leading text-generation model on the same list recorded 28.3 million downloads. Three research firms size the 2026 global small language model (SLM) market between USD 10.65 billion and USD 11.1 billion, while MarketsandMarkets put 2025 at USD 0.93 billion. Open-source models fell from 19% to 11% of enterprise LLM API usage between Menlo Ventures’ 2024 and 2025 surveys, and enterprise generative AI spending reached USD 37 billion in 2025, up from USD 11.5 billion in 2024. Chinese open-source models accounted for 1% of total enterprise LLM API usage in 2025, about 10% of the enterprise open-source slice. The top closed-weight model led the top open-weight model by 3.4% on the Arena in March 2026, against 0.5% in August 2024. Market size estimates vary by definition: Grand View Research reports USD 11.1 billion (2026) with a 15.1% CAGR (2024–2030); The Business Research Company reports USD 10.99 billion (2026) with a 19.6% CAGR (2026–2030