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Explore AI usage by adoption trends.

How AI usage has changed over time — quarter-by-quarter and year-by-year growth. Browse in-depth topic articles, each citing original research.

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Adoption Trends · AI Adoption in 2025: Enterprise Acceleration

Enterprise LLM API market share by vendor: 2023 vs end of 2025

CHART 1 · VENDOR MARKET SHARE

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Source: Epoch database, 'The State of Generative AI in the Enterprise' (November 2025); McKinsey data (September 2025). OpenAI fell to 27% from 50% in 2023; Google jumped to 21% from 7%. Top three account for 88% of enterprise API usage.
Adoption Trends · AI Tool Launch Velocity: Releases Per Year

Notable AI models released per year, 2015–2025

CHART 1 · VELOCITY CURVE

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Source: Stanford AI Index 2026 citing Epoch AI's notable model database
Adoption Trends · AI Adoption 2022–2026: The Four-Year Trajectory

US generative AI adoption, 2022–2025

CHART 1 - CONSUMER ADOPTION CURVE

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Source: Federal Reserve Bank of St. Louis, "The State of Generative AI Adoption in 2025"
Adoption Trends · AI Revenue Growth: Total Market Size by Year

Total worldwide AI spending, 2022–2026 forecast (USD billions)

Chart 1 · The market

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Source: Gartner Worldwide AI Spending Forecast (September 2025)
Adoption Trends · AI Adoption in 2023: The Breakout Year

Months to reach 100 million users — ChatGPT vs. previous record-holders

Chart 1 · The fastest app launch ever

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Source: Reuters
Adoption Trends · Annual AI Adoption Compared to Smartphone Adoption

US consumer adoption curves by years since launch

Chart 1 · The iconic adoption-curves chart

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Source: Our World in Data — Technology Adoption
Adoption Trends · AI Adoption in 2025: Enterprise Acceleration

Enterprise LLM spend: late 2024 to year-end 2025

CHART 2 · THE SPENDING ACCELERATION

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Source: Menlo Ventures Mid-Year LLM Market Update (July 2025)
Adoption Trends · AI Adoption 2022–2026: The Four-Year Trajectory

Generative AI vs. PC vs. internet adoption, by years since launch

CHART 2 - HISTORICAL COMPARISON

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Source: Federal Reserve Bank of St. Louis (Nov 2025),
Adoption Trends · AI Adoption in 2024: The Plateau That Wasn't

ChatGPT weekly active users, late 2023 through early 2025

CHART 1 - CONSUMER GROWTH RE-ACCELERATES

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Source: Andreessen Horowitz / Similarweb report via TechCrunch (March 2025)
Adoption Trends · AI Adoption in 2026: Saturation Approaching?

ChatGPT weekly active users, November 2023 to February 2026

Chart 1 · The growth curve

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Source: Demandsage ChatGPT Statistics (June 2026)
Adoption Trends · AI Adoption in 2025: Enterprise Acceleration

Enterprise gen AI and agentic AI adoption, 2025

CHART 3 · THE AGENTS IN MOTION

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Source: McKinsey "The State of AI: Global Survey 2025"
Adoption Trends · AI Tool Launch Velocity: Releases Per Year

Industry vs academic share of notable models

Chart 2 · Industry takes over

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Source: Stanford AI Index 2024, 2025, 2026 reports citing Epoch AI. Industry share rose from under 50% in 2015 to over 90% in 2025. Academia's absolute output has remained roughly flat while industry's has grown dramatically.
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