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AI Adoption in 2025: Enterprise Acceleration

If 2023 was AI's breakout year and 2024 was the year skeptics were proven wrong, 2025 was the year the enterprise stopped experimenting and started spending. Enterprise LLM spend grew more than 10x in a single year. The market leadership shifted — Anthropic overtook OpenAI in enterprise share, OpenAI lost nearly half its position, and Google climbed to a credible third. Agentic AI moved from concept to scaled production. This page assembles the data that defines the year — drawn from Menlo Ventures, McKinsey, the Federal Reserve, and primary company announcements.

5 visualizations 12 sources Last updated June 2026 Free to embed
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Source: Menlo Ventures, "2025 Mid-Year LLM Market Update " (July 2025) and "2025: The State of Generative AI in the Enterprise" (December 2025). Survey of 150 technical leaders across AI startups and large enterprises.
CHART 1 · VENDOR MARKET SHARE

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

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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.
CHART 2 · THE SPENDING ACCELERATION

Enterprise LLM spend: late 2024 to year-end 2025

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Source: Menlo Ventures Mid-Year LLM Market Update (July 2025); Menlo Ventures State of Gen AI in the Enterprise (December 2025). The $37B full-year figure breaks down to roughly $19B in user-facing AI products and $18B in AI infrastructure.
CHART 3 · THE AGENTS IN MOTION

Enterprise gen AI and agentic AI adoption, 2025

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Source: McKinsey "The State of AI: Global Survey 2025". 88% of organizations now report using AI (up from 78% in 2024). 62% are experimenting with AI agents. 23% report scaling an agentic AI system in at least one business function.
CHART 4 · CONSUMER GROWTH RE-ACCELERATES

ChatGPT weekly active users through 2025

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Source: OpenAI public announcements via official OpenAI blog posts and Sam Altman public statements. 300M (Dec 2024) → 400M (Feb 2025) → 500M (Mar 2025) → 700M (Jul 2025) → 800M (Oct 2025) → 900M (Feb 2026). ChatGPT roughly tripled its weekly users again in 2025, after tripling in 2024.
CHART 5 · A DECISIVE YEAR FOR AGENTS

Major AI milestones of 2025

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Source: Compiled by AI Behavior Index from primary company announcements (OpenAI, Anthropic, Google, Meta, DeepSeek), Menlo Ventures research reports, McKinsey surveys, and contemporaneous reporting from Reuters, CNBC, The Information, and TechCrunch. Date attributions confirmed from official press materials.

About this data

This page focuses specifically on calendar year 2025 — the period from January 2025 through December 2025. Statistics are drawn from publicly available studies, primary company announcements, and contemporaneous research reports. Menlo Ventures' "State of Generative AI in the Enterprise" reports (mid-year and year-end) are the most authoritative source on enterprise LLM market share dynamics in 2025 and are cited as the primary source for vendor share statistics.

Note that Menlo Ventures' enterprise market share figures are based on a survey of 150 technical leaders across AI startups and large enterprises and reflect production workloads, not consumer or developer usage. Consumer-facing market share (Statcounter, Similarweb) tells a different story where ChatGPT remains the leader. Data is refreshed quarterly. If you run into any issues or have a study to suggest, contact us at research@aibehaviorindex.org.

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Every statistic shown is sourced from a publicly available study, survey, or report. We aggregate, organize, and contextualize this data — but the underlying research is conducted by the cited sources. Click any source link to access the original methodology. If you run into any issues or have a study to suggest, contact us at research@aibehaviorindex.org.