META’s Muse AI agent surpassed 5 million downloads by September 30, according to Sensor Tower, after launching on September 8 in the U.S. and Canada. * Launch comparison: Sensor Tower says ChatGPT, Grok and Claude took 56, 103 and 492 days, respectively, to reach 5 million downloads. * Historical context: Muse is not the fastest app to reach that milestone; Sensor Tower cites Disney+, Threads and several games that did so sooner. * Advertising reach: Muse ranked among the top 15 U.S. brands by advertising impressions during the period cited in the report. * Revenue plan: The app is free; Meta says it eventually plans to take a small cut of sales made through the agent. * Advertising push: Sensor Tower says Meta increased Muse advertising on September 16, when downloads rose 73% from the previous day. * House ads: Muse accounted for up to 50% of Meta’s daily house-ad impressions during the two weeks cited by Sensor Tower. 30-SEP-2026 07:56 PM ET