ChatGPT dips below 50% market share for first time
▼ Summary
– ChatGPT’s global market share fell below 50% for the first time by May 2026, dropping to 46.4% as users migrated to competitors like Gemini (27.7%) and Claude (10.3%).
– Users are increasingly switching between AI assistants, with events like OpenAI’s DoD deal causing a spike in uninstalls, indicating brand trust and values matter alongside features.
– In the first half of 2026, people are on track to download nearly 2.3 billion AI apps and spend over $4.2 billion, up from $1.83 billion in H1 2025, though growth rates have slowed.
– Claude leads in monetization with 13% of its users paying for subscriptions, the highest conversion rate among major assistants, while ChatGPT began experimenting with ads in February, reaching 17% of daily users by May.
– Asia saw its first download decline of 3.3% in Q1 2026, driven by China and India, but trails North America and Europe in in-app spending, influencing where companies invest in premium features.
More than three and a half years after ChatGPT first launched, AI assistants have become a staple for millions globally, but the competitive dynamics are shifting rapidly. OpenAI’s chatbot remains the world’s most popular assistant, yet for the first time, its global market share has fallen below 50%. According to analytics firm Sensor Tower’s 2026 State of AI Report, users are increasingly migrating between platforms such as Google’s Gemini, Anthropic’s Claude, and xAI’s Grok, chipping away at ChatGPT’s dominance.
ChatGPT’s trajectory has been nothing short of remarkable. It became the fastest app ever to reach 1 billion monthly users, a milestone Sensor Tower reported this month. OpenAI itself counts weekly active users and last disclosed 900 million of them in February. The chatbot still leads with over 1.1 billion monthly users, followed by Gemini at 662 million and Claude at 245 million.
Until January, ChatGPT held more than 50% of the market. By the end of May, however, that figure had slipped to 46.4%, as Gemini climbed to 27.7% and Claude to 10.3%. Smaller players like Grok, Perplexity, DeepSeek, and Meta AI each command less than 5% of the market.
Sensor Tower’s report also highlights a growing willingness among users to switch between assistants. Specific events seem to accelerate this behavior. For instance, OpenAI’s February deal with the U. S. Department of Defense triggered a measurable spike in uninstalls, suggesting that brand trust and values alignment matter to users, not just features. While Gemini’s momentum stems largely from its integration into Google’s broader ecosystem, Claude has built a strong reputation for productivity and is closing the gap on ChatGPT’s user retention rate.
In the first half of 2026, people are on track to download nearly 2.3 billion AI apps and spend over $4.2 billion on them, according to Sensor Tower estimates. That compares to $1.83 billion in spending during H1 2025, a jump indicating that the industry is pivoting from pure growth toward monetization. Still, both download and spend growth rates have slowed, suggesting the market may be maturing even as absolute numbers continue to rise.
Regionally, Asia saw its first download decline of 3.3% in Q1 2026, driven by dips in China and India. Despite leading globally in total downloads, Asia trails North America and Europe in in-app spending, a split that matters for companies deciding where to invest in premium features and monetization.
In the U. S., users are gravitating toward AI assistants for productivity tasks and spending more on premium features. Across platforms, average revenue per user has grown industry-wide, but Claude stands out. Thirteen percent of Anthropic’s users pay for a subscription, a conversion rate that leads the field and will be a key metric for investors evaluating which AI businesses are building lasting revenue.
Sensor Tower estimates that hours spent on AI apps will jump from 17.2 billion hours in H1 2025 to roughly 36 billion hours in H1 2026. The top three assistants account for 89% of all time spent on AI assistant apps. Meanwhile, adjacent categories like AI companions or AI content generation apps remain fragmented and wide open to competition, representing both a risk and an opportunity depending on which players move first.
OpenAI began experimenting with ads in ChatGPT in February. According to Sensor Tower, the company has gradually scaled the number of ads and the share of users who see them. By May, an average of 17% of daily users were being served ads, a number to watch as ChatGPT’s monetization strategy evolves beyond subscriptions.
Software and shopping are the largest advertiser categories in ChatGPT so far, followed by Media & Entertainment and Food & Dining.
As ChatGPT deepens its shopping integrations, it is increasingly sending referral traffic to retailers like Target, Walmart, and Costco. Amazon, which has blocked ChatGPT’s web crawlers, has seen stagnant referral traffic from the platform as a result.
That creates an opening for others. Sites like Walmart have embedded their own AI assistants to help shoppers find products. While Amazon’s Rufus has seen flat user growth, Walmart’s Spark has been gaining ground. Sensor Tower also noted that Amazon shoppers who used Rufus spent more time in the app and converted at higher rates than those who did not, hinting that on-platform AI can meaningfully influence purchasing behavior when users actually engage with it.
(Source: TechCrunch)
