AI Leaders Agree to Slow Development Amid Existential Risk Fears

Leading artificial intelligence executives have publicly agreed to slow the development of advanced AI models, citing existential risks to humanity. The consensus, which includes the heads of Anthropic, OpenAI, and xAI, has triggered a significant sell-off in global technology stocks and drawn sharp political criticism. Anthropic CEO Dario Amodei proposed the industry-wide slowdown in a lengthy essay published on September 13, 2026. He called for independent monitoring of AI models, global agreements on safety standards, and a deceleration of the pace at which companies advance model capabilities. OpenAI CEO Sam Altman and xAI CEO Elon Musk both publicly voiced their support for Amodei's position. The warnings from these industry leaders prompted a sharp market reaction. On September 15, 2026, the Nasdaq 100 index fell 1.7%, with major chipmakers and AI-linked companies experiencing steep declines. Nvidia shares dropped 3.5%, while Advanced Micro Devices fell 5.6%. In Europe, ASML's stock declined 6.7%, and in Asia, SoftBank's shares plunged as much as 13.2%. The proposed slowdown has also ignited a geopolitical debate. U.S.