Anthropic plans to stage its blockbuster initial public offering in November, later than many investors expected, as leaders of the biggest companies in the artificial-intelligence race call for a slowdown in the development of the technology.

The AI giant had been expected to stage a record-breaking offering in October, according to people familiar with the matter. Some of Anthropic's advisers say waiting until November would give the startup time to share third-quarter financials that show a strong competitive position, even after rival OpenAI launched its newest model, Astra, in September.

Some of the people familiar with the timing say the decision to aim for a November offering was made before a public warning from a former Anthropic researcher set off a debate about whether AI advancements are moving too fast. They caution the timing could still change.

Anthropic Chief Executive Dario Amodei was the first of the three major AI executives to call for a slowdown, penning a blog post Saturday that said the risks posed by today's cutting-edge tools were too great to continue development at the same breakneck pace. Leaders of rival AI labs including OpenAI CEO Sam Altman and SpaceX's Elon Musk echoed the sentiment.

Investors have expected Anthropic to be valued at around $2 trillion and raise up to $100 billion in the offering, both figures that would top records set by SpaceX's June debut.

Anthropic plans to meet with prospective investors in the coming days, some of whom are expected to push the company on what impact a possible slowdown in the rollout of new AI models would mean for Anthropic's finances or target valuation.

The meetings are meant to help the company and its bankers gauge investor appetite for an upcoming stock offering.

Anthropic's advisers and current investors continue to argue that slowing the pace of development is unlikely to drastically impact its financial prospects, given the revenue that can be made from existing models.

Current investors expect the company to reach more than $110 billion in annualized revenue by year-end.

There was little IPO talk when the company gathered some of its earliest investors and partners at its headquarters Thursday. Instead, its executives, including Jared Kaplan, Benjamin Mann and Andrej Karpathy, discussed the company's new offerings, including Model Hardware Standard, a product that allows AI agents to operate physical products, like a microscope or a robotic arm, according to an attendee.

At a dinner Anthropic hosted at a San Francisco steakhouse Thursday night, venture capital investors' chatter turned to Amodei's safety warning and the news cycle it created.

Many of the Silicon Valley firms that have piled into Anthropic said the timing of Amodei's push for new, industrywide safety standards makes sense and they weren't concerned it would dilute interest in the IPO. Once Anthropic is a publicly traded company, it is likely to face far greater scrutiny from shareholders, and establishing its position on broader security risks may help protect it if something goes wrong later, one of the investors said.

Meanwhile, Anthropic's biggest competitor, OpenAI, has made clear it doesn't plan to go public until 2027 and it is in early discussions for new financing that would value the company at over $1.2 trillion, if completed. The last time the ChatGPT developer raised capital, it pulled in more than $120 billion from investors. If OpenAI raises a similar amount before Anthropic goes public, it could sap demand for the Claude developer's listing, some Anthropic investors said.