ChatGPT's share of the AI assistant market has fallen below 50% for the first time, now at 46.4% as of May 2026, according to Sensor Tower. Despite this, ChatGPT remains the largest platform with over 1.1 billion monthly users, significantly outpacing competitors like Gemini (662 million) and Claude (245 million). This shift indicates a maturing and fragmenting market rather than a decline for ChatGPT, with Claude showing particularly strong growth. OpenAI has also begun integrating advertisements into ChatGPT, with approximately 17% of daily users seeing ads, including shopping integrations with major retailers, signaling a new advertising revenue stream. AI
IMPACT The AI assistant market is fragmenting, requiring businesses to optimize for multiple models and plan for paid placements within AI responses.
RANK_REASON Article discusses market share shifts and business strategy changes for AI assistants, rather than a new release or core research.
AI-generated summary · Google Gemini · from 1 sources. How we write summaries →
