The sources you have provided are excerpts from the Artificial Intelligence Index Report 20251 . This report tracks and interprets critical trends shaping the field of AI, from technological evolution to its impact on society and governance . The 2025 edition includes in-depth analyses of AI hardware, inference costs, publication trends, and the adoption of responsible AI practices . The report highlights improvements in AI performance on demanding benchmarks and its increasing role in scientific advancements, evidenced by Nobel and Turing Prizes .... While global optimism about AI is growing, significant regional differences in sentiment remain . Policymakers across the globe are demonstrating a significant interest in responsible AI and are intensifying cooperation on AI governance