AI Index Report · Every edition, read as data

Two editions, one trend line

The AI Index is an independent Stanford HAI initiative that has tracked artificial intelligence since 2017 — across research, technical performance, responsible AI, the economy, science and medicine, policy, education, and public opinion. Reading two editions side by side shows something no single edition can: the rate of change. These figures compare the 2026 edition (measuring 2025) against the 2025 edition (measuring 2024).

131% growth in global corporate AI investment, 2024 → 2025

88% of organizations using AI in 2025 (78% a year earlier)

362AI incidents logged in 2025 (233 in 2024)

286US private AI investment in 2025 (US$ bn; 109.1 in 2024)

90% of notable models coming from industry, both years

2editions covered on this site

Pick an edition

Each edition is a complete site of its own — an overview page plus one deep dive per chapter, in English and Traditional Chinese.

2026 edition · 9th

Reports on 2025. Nine chapters — Science and Medicine are split apart. Investment more than doubles, adoption reaches 88% of organizations, and the labor-market signal appears first in the youngest workers.

2025 data9 chapters

Open the 2026 edition

2025 edition · 8th

Reports on 2024. Eight chapters, with Science and Medicine combined. Benchmarks fall fast, inference costs collapse more than 280-fold, and two Nobel Prizes go to AI-driven work.

2024 data8 chapters

Open the 2025 edition

The money roughly doubled in a single year

Global corporate AI investment — the broadest measure, covering private investment, mergers and acquisitions, and public offerings. Figures in billions of US dollars, by the calendar year measured.

Adoption kept climbing from an already high base

Share of surveyed organizations reporting AI use. The jump from 55% to 78% between 2023 and 2024 was the steepest; 2025 adds ten more points on top of it.

Reported incidents rose alongside deployment

AI-related incidents logged in the AI Incidents Database. Rising counts reflect both more real-world failures and better reporting — the database itself notes that coverage improves each year.

How to read this site

A few things worth knowing before you dive into an edition.

An edition is named for the year it is published, not the year it measures

The 2025 edition reports on calendar year 2024; the 2026 edition reports on 2025. This trips people up constantly when comparing figures across sources, so every chart on this site labels the measured year rather than the edition.

The chapter structure changed between editions

The 2025 edition has eight chapters, treating Science and Medicine as one. The 2026 edition splits them, giving nine. Chapter numbers therefore do not line up across editions — follow the chapter names, not the numbers.

This is a reformatting, not the report

Everything here is drawn from the reports' own top takeaways and per-chapter highlights, restructured for reading on screen. Nothing is inferred, extrapolated, or supplemented from other sources. Where a figure matters, go to the original — each edition links straight to it.

Read the original reports

The AI Index is published open access by the Stanford Institute for Human-Centered AI under CC BY-ND 4.0. Full PDFs, the underlying raw data, and the Global AI Vibrancy tool are all available there.

Stanford HAI · AI Index