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The Stanford Institute for Human-Centered Artificial Intelligence (HAI) published the ninth edition of its annual Artificial Intelligence Index Report on April 13, 2026. The 400+ page report documents that US companies released 50 notable AI models in 2025, maintaining global leadership, while China is closing the gap. Industry accounts for over 90 percent of notable AI model releases, up from under 50 percent in 2015. World AI compute capacity has grown 3.3x yearly since 2022. China dominates robotics deployment with 295,000 industrial robots installed in 2024, compared to 34,200 in the US. Major AI companies including OpenAI and Anthropic are pursuing IPOs, while US local governments are implementing restrictions on new data center development due to energy concerns. Stanford HAI reported the core details. IEEE Spectrum noted additional context. AIhub added corroborating details.