Anthropic has filed confidentially for an initial public offering on the US stock market, the company announced Monday. The AI firm makes the Claude chatbot, popular with software engineers and other business clients, and has seen a meteoric rise this year.

The company did not disclose the valuation it will target on the stock market, nor did it make public other terms of the offering. The startup announced on Thursday that it had raised $65bn in funding to value the company at $965bn post-money. Anthropic was valued at $380bn in February.

The move makes Anthropic the world’s most valuable AI startup, eclipsing its competitor OpenAI, which is expected to file for a public offering in the coming weeks.

The financial stakes of AI race are rising as Elon Musk’s SpaceX, OpenAI and Anthropic are slated to go public this year. SpaceX has filed for a stock market float at a valuation of about $1.75tn as it seeks $75bn in investment.

More details soon …