Anthropic filed confidentially for a U.S. initial public offering on Monday. The move tests investor appetite for the artificial intelligence sector. The company has not yet disclosed the size or terms of the offering.

Anthropic recently raised $65 billion in capital. This funding established a post-money valuation of $965 billion. This figure surpasses the valuation of rival firm OpenAI.

OpenAI and SpaceX are also expected to go public this year. These combined listings could raise more than $200 billion.