Anthropic PBC has confidentially filed preliminary documentation for an initial public offering (IPO) as it races to join longtime rival OpenAI in a Wall Street debut that could happen as early as this fall.

“The number of shares to be offered and the price have not yet been determined,” the company said in a blog post on Monday.

The maker of Claude recently raised $65 billion in a funding round with a valuation of $965 billion, including investment, surpassing the value of rival OpenAI for the first time. Anthropic has seen a surge in demand as customers seek to use its tools to streamline programming and other tasks.

Anthropic and rival OpenAI have been vying for space in recent months as both seek to go public. OpenAI itself was reportedly preparing its own confidential filing for an IPO in the coming weeks and was aiming for a stock market debut sometime this fall, Bloomberg reported in May.