ChatGPT's Market Share Drops to 50% as AI Usage Fragments

ChatGPT loses ground in expanding market

ChatGPT's dominance in the AI assistant market is eroding rapidly, even as overall usage grows. The platform's share of prompt volume dropped from 70% to 50% between January and June 2026, according to Comscore's Q2 2026 AI Intelligence Report released today.

The shift reflects a maturing market where users are spreading across multiple platforms rather than concentrating on a single tool. Gemini nearly doubled its share from 17% to 30% during the same period, while Claude climbed from 2% to 11%. Comscore based its findings on opt-in panel data from 500,000 to 1 million users.

"The message isn't that ChatGPT is winning the race. The message is AI assistants collectively are becoming a consumer behavior layer, and consumers are developing different relationships with different assistants," said Smriti Sharma, Comscore's chief analytics and technology officer.

Why it matters

Publishers and marketers who optimized solely for ChatGPT visibility now face a fragmented landscape requiring multi-platform strategies. The data suggests AI discovery is following the same path as social media, where audiences and behavior patterns vary significantly by platform. This fragmentation complicates measurement, content optimization, and licensing negotiations as companies must now track performance across multiple AI systems simultaneously.

Platform-specific growth patterns emerge

The data reveals distinct adoption trajectories for each assistant. ChatGPT reached 168 million desktop conversations in June 2026, growing its multiplatform visitation to 99 million from 59 million year-over-year. Claude desktop conversations surged from 1.1 million in October 2025 to nearly 40 million in April 2026, though growth plateaued at 22.3 million by June. Gemini desktop conversations expanded from 8 million to 89 million over the past year.

Overall adoption is accelerating: 35% of desktop users and 29% of mobile users visited an AI assistant in June 2026, compared to 25% and 12% respectively in January 2025.

Google's AI Overviews in search results are also expanding their footprint. Desktop searches featuring an AI Overview grew from 25.8% in July 2025 to 39.4% in June 2026, potentially reducing publisher referral traffic as Google answers more queries directly.

The sourcing versus citation gap

Comscore's report highlights a critical distinction between being used as a source and receiving visible attribution. Tripadvisor accounts for 61% of travel sourcing by AI platforms but receives only 21% of citations—a gap that has significant implications for brand visibility and licensing negotiations.

"Being used by AI is not equal to being visible in AI," Sharma explained. "Just because you are being used as an answer in AI doesn't mean that you're visible."

Michael King, founder and CEO of content marketing agency iPullRank, noted that retrieval happens in two stages: initial sourcing pulls in a wide set of pages, then the model synthesizes and cites only a handful. "For measurement, that means citations alone are a lagging, incomplete metric," King said.

Publishers are already adapting, with companies from Forbes to Time using their citation rates across AI platforms as new metrics to monetize with advertisers. However, no consistent measurement standard exists across platforms.

King advised publishers to shift their approach: "Publishers should stop asking 'how do we show up in ChatGPT' and start asking 'where is our audience actually asking questions, and are we showing up there.'"

The findings were first reported by Digiday based on Comscore's Q2 2026 AI Intelligence Report.