ChatGPT's market share dropped from 77% to 57% in one year, while Gemini quadrupled to 25%

ME News Report, April 16 (UTC+8), according to Beating Monitoring, Similarweb released data on the market share of generative AI websites until March 2026. Over the past 12 months, ChatGPT dropped from 77.43% to 56.72%, losing over 20 percentage points; Gemini rose from 6.00% to 25.46%, more than quadrupling, taking the largest share of the loss.
Product market share in March:

  1. ChatGPT: 56.72%
  2. Gemini: 25.46%
  3. Claude: 6.02%
  4. DeepSeek: 3.74%
  5. Grok: 3.44%
  6. Copilot: 1.99%
  7. Perplexity: 1.64%
    The most volatile short-term change was Claude: just 1.40% a year ago, 2.22% in January, and breaking 6% in March, nearly doubling from February to March.
    Grok fell from second place (7.03%) a year ago to fifth (3.44%), overtaken by DeepSeek.
    The rise of Copilot partly results from a change in statistical methodology, as Similarweb included Microsoft m365.cloud.microsoft/chat traffic into Copilot.
    A year ago, ChatGPT held an almost monopolistic 77% share; now, the top two combined account for 82% (ChatGPT 57% + Gemini 25%), shifting from a single dominant player to a duopoly.
    The growth patterns are very different: Gemini steadily climbs each quarter, while Claude remained almost unchanged in the first 10 months and suddenly jumped from 2% to 6% in the last two months.
    Grok experienced the deepest decline, dropping from second place a year ago to being surpassed by three others now.
    (Source: BlockBeats)
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