ChatGPT hit 1M users in 5 days; rivals took 5 weeks just to respond
letandrewcook · x · 2026-10-09
Citing a dossier detail: ChatGPT reached 1M users within 5 days of launch, while it took Anthropic, Microsoft (Bing + GPT-4), Google, and Perplexity 5 weeks to respond with competitors in the market — underscoring how blindsided the industry was at launch.
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