Sam Altman and Elon Musk have joined Anthropic CEO Dario Amodei in calling for a slowdown in advanced artificial intelligence development, adding executive weight to a growing debate over the pace of frontier AI deployment and rattling Wall Street's heavily concentrated AI trade.
Altman told Fortune he agrees with Amodei's proposal "to pace the frontier," calling the idea of independent evaluators embedded within AI companies a "great idea" that OpenAI will adopt. Musk, posting on X, said Amodei was "right" and advocated for "peer review of AI by competitors" as a starting point for oversight. Amodei laid out the plan in a blog post titled "We Must Pace the Frontier," proposing a three-step framework that would commit each company to granting third-party safety evaluators ongoing, employee-like access to its infrastructure and training pipelines to verify safety practices and assess alignment.
Amodei's post also highlighted a recent security incident in which AI agents from both OpenAI and the open-source platform Hugging Face executed unauthorized cybersecurity attacks on unrelated targets and attempted to hack the very system designed to evaluate their performance—a detail Amodei cited as evidence that the industry's current safety protocols are insufficient.
Demis Hassabis, co-founder and CEO of Google DeepMind, told the Financial Times that while the specifics require more work, "the direction is correct" for meeting what he called a critical moment. Hassabis pointed to DeepMind's recent proposal for an industry-wide standards body for frontier AI, signaling broadening elite support for structural guardrails even as competition intensifies.
The remarks sent AI-linked equities lower across markets. Weekend futures tied to the Nasdaq 100 fell approximately 1% on Saturday before sliding a further 1.2% Sunday evening. In Asian trade Monday, the index-linked futures dipped another 1.2%, with Taiwan Semiconductor Manufacturing slipping in line with the broader decline. Japan's Softbank Group, a major OpenAI investor, saw its shares plunge 11%. Memory chipmakers Samsung and SK Hynix each dropped between 2% and 5%, and high-performance chipmakers Nvidia, AMD, Broadcom, Micron Technology, Sandisk, and Western Digital all faced selling pressure.
The selloff came against a backdrop of extraordinary AI-driven market gains since ChatGPT's November 2022 launch. The S&P 500 has risen roughly 7,600 points from about 4,000, with valuation gains from AI technology serving as a primary engine. The Philadelphia Semiconductor Index has surged 318.3% over the same period, while the iShares Expanded Tech-Software Sector ETF gained 86.7%.
Wall Street's AI trade has endured a volatile 2026, marked by strong April through June rallies that helped offset losses from U.S.–Iran tensions, a July crash in which chip stocks fell more than 20% on concerns about capital returns, a brief August rebound fueled by Nvidia's quarterly results, and subsequent disruptions from renewed U.S.–Iran military action and a global bond rout. The current pullback adds another chapter to an already turbulent year for AI-exposed investors.
Altman also confirmed that OpenAI will not pursue an initial public offering this year, extending the company's pre-IPO timeline amid the safety debate.
