Anthropic has filed for an initial public offering (IPO), surprising analysts and escalating competition with OpenAI to reach public markets first.

The filing will remain confidential while the Securities and Exchange Commission reviews it, and details such as share price and size have not yet been determined.

The move comes after Anthropic was recently valued at about $965 billion following a major funding round.

If successful, its IPO could rank among the largest in history and position it in a tight race with other major tech listings, including SpaceX and OpenAI, NBC News has reported.

The company’s timing is seen as strategic, as both AI firms compete for massive new funding to support expanding data center infrastructure.