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ChatGPT vs Bing Chat: What Happened

In February 2023, Microsoft put ChatGPT-class AI inside Bing and declared the search wars reopened. Three years later the verdict is in: the same underlying technology that made ChatGPT the fastest-growing app in history barely moved Bing's search share, which crept from roughly 3% to about 4% globally. This page tracks both trajectories side by side and asks what the divergence reveals about distribution, defaults, and why a better feature doesn't dislodge an entrenched habit.

4 visualizations 5 sources Last updated June 2026 Free to embed
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Source: StatCounter global search share, via Bloomberg and WebFX (2023–2026).
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Chart 1 · The divergence

Two trajectories after the same AI launch

Same AI tech, two outcomes (Feb 2023 →)

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Source: StatCounter (Bing share) and OpenAI disclosures (ChatGPT users). Two different metrics on one timeline to show divergence — Bing global search share (%) vs ChatGPT weekly users (indexed). Not a like-for-like axis; see methodology.
Chart 2 · The search market

Global search share barely moved

Global search share (2026)

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Source: StatCounter global all-device search share. Google vs Bing vs others, 2026. Bing rose ~3.0%→4.1% over 24 months post-Copilot.
Chart 3 · Bing's creep

Bing global search share, 2022–2026

Bing global search share, 2022–2026

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Source: StatCounter, via Search Engine Roundtable and Bloomberg. Bing global all-device search share at year-ends. ChatGPT integration launched Feb 2023; the lift was modest and is plateauing.
Chart 4 · Where AI search went

AI chatbot share vs Bing's search gain

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Source: WebFX / StatCounter (US, 2026). ChatGPT leads AI-chatbot share (~73% US) while Bing's search-engine share sits near 10% US / ~4% global — the AI demand went to standalone assistants, not Bing search.

About this data

This page compiles search-engine share data from StatCounter (as reported by Bloomberg, WebFX, and others) and ChatGPT usage figures from OpenAI disclosures. The two are different metrics and are shown together only to illustrate divergence, not as a like-for-like comparison.

The AI Behavior Index is the research arm of OneChat AI, an integrated multi-model AI platform. We compile and analyze data from primary sources to make AI adoption and market trends more accessible to journalists, researchers, and decision-makers.

Comparing different things, carefully: ChatGPT user counts and Bing search-engine share are not the same unit. Chart 1 indexes them on one timeline purely to show that the same core technology produced wildly different outcomes in two different distribution contexts (a standalone destination vs a feature inside an incumbent-dominated market). The other charts keep metrics separate.

Methodology notes: StatCounter measures share by tracked page views and varies from other panels (e.g. Similarweb); absolute Bing share differs by source (often 3–4% global, ~10% US). "Bing Chat" was rebranded to "Copilot"; share figures here track the Bing search engine that the AI feature was meant to lift.

Sources used on this page:

Corrections or suggestions: research@aibehaviorindex.org

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