What ChatGPT’s Market Share Decline in Downloads Really Means
ChatGPT’s market share decline in app downloads refers to a growing portion of new AI assistant installs shifting from OpenAI’s flagship app toward emerging rivals such as Claude, Meta AI, and Gemini, even as ChatGPT keeps a far larger installed base, stronger engagement, and higher revenue than competitors, highlighting a maturing and more fragmented AI app landscape rather than a simple loss of category leadership. Sensor Tower data shows how steep ChatGPT’s rise has been: downloads surged 190% year over year in both 2024 and 2025, pushing the app to more than 900 million global monthly active users by the end of 2025. That early surge helped ChatGPT become almost synonymous with consumer AI. Now, as adoption slows and more options arrive, the story is less about collapse and more about how a dominant first mover adapts to life in a crowded field.
Rivals Chip Away at AI Assistant Downloads
AI app competition is reshaping how new users spread their downloads across assistants. Claude, Meta AI, and Gemini are all gaining ground, especially in recent quarters. Claude and Meta AI together held only about 1% of global AI assistant downloads in the second quarter of 2025. In the quarter-to-date period of the second quarter of 2026, those same apps account for 24% of global downloads. Meanwhile, Meta AI, Claude, and Gemini are seeing triple‑digit growth in downloads, while ChatGPT’s downloads are down on a year‑over‑year basis in the same period. Yet OpenAI still leads the pack in raw demand: according to Sensor Tower, “the app still received triple the number of downloads of any competitor within the category,” underscoring that share loss is happening off a very high base.
OpenAI User Retention: Early Lead, Sticky Habits
OpenAI user retention remains the key counterweight to ChatGPT’s slowing download momentum. Early entry into the generative AI app market gave ChatGPT time to build habits that rivals now struggle to dislodge. Sensor Tower reports that ChatGPT has the highest stickiness among top AI assistants, with 44% of monthly users engaging with the app daily. That depth of usage is a powerful moat: losing some share of new downloads matters less if existing users stay active and keep spending. ChatGPT also continues to rank at the top of app charts, reaching the number‑one position in the US Apple App Store’s free apps ranking on 115 non‑consecutive days in 2026. High daily use and strong visibility in app stores help OpenAI defend its lead even as more AI apps launch and marketing noise grows around competing assistants.
From Subscriptions to Ads: OpenAI’s Diversified Revenue Push
While download growth cools, OpenAI is expanding how it earns from ChatGPT’s large audience. Mobile in‑app purchase revenue remains a pillar: Sensor Tower estimates ChatGPT has generated nearly USD 1.5bn (approx. RM6.9bn) in net in‑app purchase revenue in year‑to‑date 2026, second only to TikTok, while Claude has reached USD 163mn (approx. RM749mn) over the same period. On top of that, OpenAI is turning ChatGPT into an ad platform. ChatGPT ads now reach around 20% of app users by the end of May 2026, up from roughly 1% in early March, and ad density per user has climbed 60% since launch. Initially focused on big brands like Target and Home Depot, the company is rolling out a self‑serve Ads Manager and adding cost‑per‑click options and conversion‑focused formats, broadening access to startups and small businesses that want measurable results.
Ad Tools, IPO Momentum, and a Fragmented AI Future
OpenAI’s ad expansion is about more than near‑term revenue; it is also about market positioning ahead of its planned USD 750bn–USD 1tn (approx. RM3.4trn–RM4.6trn) IPO in the second half of 2026. The company is building buying and measurement tools that mirror established digital ad platforms: a pixel for tracking post‑click activity, a Conversions API to send back purchase or lead data, and partnerships with agencies such as Dentsu and WPP and tech firms including Adobe and Criteo. At the same time, OpenAI is itself a major advertiser, ranking as the 31st largest advertiser in the US in May 2026, amid a 12‑fold year‑over‑year increase in generative AI ad spending. Market fragmentation across Claude, Gemini, Meta AI, and others looks set to continue. Yet with strong user retention, high‑value in‑app purchases, and a fast‑growing ad business, ChatGPT remains the central gravity point of the AI assistant downloads market.