NEW YORK, Oct 15 (Reuters) – Some existing and potential investors are reconsidering their valuation for Anthropic as the AI company revealed its latest financial data, indicating a lower estimate than previously anticipated. At a recent investor meeting in San Francisco, some participants suggested a valuation of approximately $1.5 trillion, a notable decrease from the earlier expectation of around $2 trillion for its initial public offering (IPO) set for November. Anthropic reported a significant third-quarter revenue increase of 45%, reaching $16.8 billion, which somewhat alleviated worries about the costs associated with AI development. However, investor sentiment was dampened by a deceleration in sequential revenue growth, as previous quarters had shown much larger gains. The slowing IPO environment, exacerbated by a tech selloff, further complicates Anthropic’s entry into the market, with the success of this offering seen as crucial for the broader AI sector’s outlook. Founded in 2021 by former OpenAI executives, Anthropic has established itself as a prominent generative AI developer, heavily backed by major firms like Google and Amazon, despite facing substantial operating losses in the past year.