# AI Market Dynamics Shift as Claude and Gemini Gain Ground

> The latest report reveals a significant decline in ChatGPT's market share, dropping from 70% to 50%, as Claude and Gemini gain traction among consumers, reshaping the AI assistant landscape.

**Source**: comscore.com | **Published**: 2026-09-23 | **Type**: article

## Key Facts

- Claude's prompt volume surged from 2% to 11%, indicating strong competitive growth against ChatGPT.
- Gemini's share jumped from 17% to 30%, showcasing its rapid adoption and potential market disruption.
- ChatGPT's volume dropped from 70% to 50%, revealing vulnerability as competition intensifies in AI.
- Mobile AI assistant usage rose 25%, signaling a strategic shift towards mobile-first consumer engagement.
- Fashion and Health/Beauty brand mentions in AI responses soared 123% and 150%, highlighting monetization potential.

## Summary

Comscore's Q2 2026 AI Intelligence Report reveals significant shifts in the competitive landscape of AI assistants, with Claude and Google's Gemini rapidly gaining market share at the expense of ChatGPT. This trend indicates a diversifying consumer preference for AI tools, which could reshape marketing strategies and brand visibility in the digital ecosystem.

ChatGPT, while still the dominant player, saw its share of AI prompt volume decline from 70% to 50% between January and June 2026. Despite maintaining 168 million desktop conversations and increasing multiplatform visitation to 99 million, the erosion of its market share signals a growing fragmentation in consumer engagement with AI technologies. This shift highlights the necessity for brands to adapt their strategies to accommodate a broader array of AI platforms rather than relying solely on a single dominant tool.

Claude's ascent is notable, with its share of AI prompt volume soaring from 2% to 11% within the same timeframe. Its desktop conversations surged from 1.1 million in October 2025 to nearly 40 million by April 2026, demonstrating a robust growth trajectory despite a plateau in June. Similarly, Gemini's share nearly doubled from 17% to 30%, with desktop interactions rising from 8 million to 89 million. This rapid growth underscores the increasing competition in the AI assistant space, compelling brands to reassess their engagement strategies across multiple platforms.

The report also highlights a shift in user demographics and behaviors. Mobile adoption of AI assistants has outpaced desktop usage, with a 12% increase among mobile users compared to 25% on desktops since early 2025. Notably, women continue to lead mobile usage of AI assistants, indicating a potential target demographic for brands looking to optimize their outreach and marketing efforts.

The report further emphasizes the expanding role of AI in brand discovery and monetization. Mentions of fashion brands in AI responses surged by 123%, while health and beauty brands saw a 150% increase between January and March 2026. The introduction of sponsored ads within AI travel search results, which rose from 6% to 24% in just two months, illustrates the emerging monetization opportunities within AI-driven platforms. This trend suggests that brands must not only focus on visibility but also on strategic partnerships with AI platforms to leverage these new advertising avenues effectively.

As AI assistants become integral to consumer decision-making, understanding the nuances of how these tools influence brand interactions will be critical. The growth of AI overviews in search results, which increased from 25.8% to 39.4% for Google and from 11.8% to 17.3% for Bing's Copilot, reflects a shift toward AI-enhanced search experiences. This evolution necessitates that brands refine their SEO strategies to optimize for AI-generated content and responses.

Looking ahead, the competitive dynamics in the AI assistant market will likely prompt ongoing innovation and differentiation among platforms. Companies that prioritize adaptability and invest in understanding consumer preferences across diverse AI tools will be better positioned to capture market share. As the landscape continues to evolve, brands must remain vigilant and agile, leveraging insights from emerging data to drive their growth strategies in this increasingly complex environment.

## Entities

- **Companies**: Comscore
- **Products**: ChatGPT, Claude, Gemini, Copilot
- **Technologies**: AI assistants, AI-powered search
- **People**: Smriti Sharma
- **Organizations**: TikTok, Meta, YouTube, Google, Bing

## Key Concepts

AI assistant adoption, Competition among AI assistants, Mobile vs. desktop usage, Consumer behavior, Brand visibility in AI responses, Monetization through AI, Gender differences in AI usage, AI overview growth in search

## Definitions

- **AI assistants**: AI assistants are software applications that use artificial intelligence to perform tasks or provide services to users.
- **AI-powered search**: AI-powered search refers to search engines that utilize artificial intelligence to enhance the search experience and results.
- **Monetization**: Monetization is the process of generating revenue from a product or service.
- **Prompt volume**: Prompt volume refers to the total number of queries or requests made to AI assistants.
- **Index scores**: Index scores are metrics used to compare usage levels between different demographic groups.

## Use Cases

- Brands using AI assistants for customer engagement
- Publishers analyzing consumer attention through AI data
- Marketers leveraging AI for brand discovery
- Travel companies integrating sponsored ads in AI search results
- Fashion and health brands increasing visibility through AI mentions

## Frequently Asked Questions

**What does the Comscore AI Intelligence Report reveal?**

The report shows that AI assistant adoption is increasing across all age groups, with women leading mobile usage. It highlights the growing competition among AI assistants like Claude and Gemini against ChatGPT.

**How has ChatGPT's market share changed?**

ChatGPT's share of total AI prompt volume has decreased from 70% to 50% between January and June 2026, indicating a shift in consumer preferences towards other AI tools.

**What trends are observed in mobile versus desktop AI assistant usage?**

The report indicates that mobile usage of AI assistants is growing at a faster rate than desktop usage, with a 12% increase on mobile compared to 25% on desktop since early 2025.

**What demographic trends are noted in AI assistant usage?**

Women are reported to be the largest users of AI assistants on mobile devices, while men tend to over-index on desktop platforms, reflecting different usage patterns across genders.

**How are brands leveraging AI for monetization?**

Brands are increasingly using AI as a channel for discovery and monetization, with significant growth in brand mentions in AI responses and the introduction of sponsored ads in AI search results.

## Links

- [Read on Welcome.AI](https://welcome.ai/content/ai-market-dynamics-shift-as-claude-and-gemini-gain-ground)
- [Original source](https://www.comscore.com/Insights/Press-Releases/2026/9/Comscores-Q2-2026-AI-Intelligence-Report)
- [OpenAI](https://welcome.ai/company/openai): Featured company

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Source: Welcome.AI | https://welcome.ai/content/ai-market-dynamics-shift-as-claude-and-gemini-gain-ground