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ChatGPT Tops a16z Consumer-AI Rankings as Gemini and Grok Close the Gap

The fifth report charts rapid rival gains across web and mobile.

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Gemini gains on ChatGPT says Andreessen Horowitz report
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Overview

  • Google’s Gemini ranks No. 2 on both web and mobile, with roughly half of ChatGPT’s mobile monthly active users and about 12% of its web visits.
  • Nearly 90% of Gemini’s mobile users are on Android, underscoring its concentration on Google’s ecosystem.
  • xAI’s Grok has surpassed roughly 20 million monthly active users and grew nearly 40% after the July Grok 4 release, placing No. 4 on the web and No. 23 on mobile.
  • Google now appears with four distinct AI web properties—Gemini, AI Studio, NotebookLM, and Google Labs—allowing separate measurement of each product’s growth.
  • DeepSeek’s usage has dropped from its peak on both mobile and web, while app-store crackdowns on ChatGPT clones have opened space for novel mobile apps and helped developer trends like vibe coding lift newcomers such as Replit and Lovable.