SynopsisOpenAI's ChatGPT achieved a record 1 billion users in just three years, outpacing major tech applications. However, the AI giant faces mounting competition, with Anthropic reportedly surpassing OpenAI in business adoption. This intense rivalry sets the stage as both companies prepare for potential Wall Street dominance.ETtechLast week, OpenAI’s ChatGPT became the fastest application to reach 1 billion global monthly active users, within three years of its launch as of May 2026, according to data from SensorTower. By comparison, Google Maps, Google Chrome, YouTube and Instagram took 5-8 years to reach the same mark, the data showed. However, OpenAI, which is reportedly eyeing a US market listing, is also facing challenges as competition intensifies. A report from fintech firm Ramp’s AI Index revealed that Anthropic has surpassed OpenAI in business adoption. ET looks at how dynamics are shifting in the AI landscape as companies gear up for public market:ETtech
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