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Six Weeks After AI Leaders Backed a Slowdown, Model Releases Continued
Six weeks after prominent AI leaders endorsed slowing development, Anthropic, OpenAI, Google and SpaceX were reported to have released more capable models. Anthropic filed for an IPO on October 26, 2026, and its prospectus reported $16.3 billion in revenue.
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Key takeaways
- Six weeks after prominent AI leaders endorsed slowing development, Anthropic, OpenAI, Google and SpaceX were reported to have released more capable models.
- Anthropic filed for an IPO on October 26, 2026, and its prospectus reported $16.3 billion in revenue.
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openai.comCreate a landscape editorial hero image for this Studio Global article: How have Anthropic, OpenAI, Google and SpaceX continued releasing more capable AI models in the six weeks after Dario Amodei’s September 12,. Article summary: The available reporting indicates that the public slowdown commitments had not translated into a halt in capability releases: Anthropic, OpenAI, Google and SpaceX all released more capable models after Amodei, Musk and A. Topic tags: general, government, news, general web, user generated. Style: premium digital editorial illustration, source-backed research mood, clean composition, high detail, modern web publication hero. Use reference image context only for broad subject, composition, and topical grounding; do not copy the exact image. Avoid: logos, brand marks, copyrighted characters, real person likenesses, fake screenshots, UI text, readable text, watermar
In September, Anthropic CEO Dario Amodei called for slowing the development of advanced AI, and OpenAI CEO Sam Altman and SpaceX CEO Elon Musk publicly backed the idea. Six weeks later, reporting described continued releases of more capable models by Anthropic, OpenAI, Google and SpaceX. The contrast is clear; whether it amounts to a broken pledge is harder to establish, because the available reporting does not define a measurable slowdown target. 18
What happened after the slowdown calls
Amodei’s September 12 essay argued for decelerating AI development to give safety work more time. Other prominent technology leaders endorsed a slower pace, including Altman and Musk. 18
By October 29, The Washington Post reported little sign that Anthropic, OpenAI and SpaceX had decelerated. Its reporting also identified Google among the companies that had launched more capable models since the public calls to slow down.
That is evidence of continued releases—not a complete measure of development speed. The available reporting does not specify which models were released, how their capabilities compared with earlier systems, or a baseline against which to judge whether development had slowed. A release after a pledge does not, on its own, show that a company accelerated or violated a defined commitment.
Anthropic’s IPO adds scrutiny, not a verdict
Anthropic filed a registration statement for a proposed public offering on October 26, 2026, and said it intended to list on the Nasdaq Global Select Market under the ticker ANT. 8 Reporting on the prospectus put the company’s revenue at $16.3 billion.
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The filing makes the tension between safety rhetoric and commercial pressures more visible. But an IPO filing is not proof that Anthropic broke a slowdown pledge. The sources available here do not provide enough verified detail to assess the specific hundreds-of-billions spending plans, compute investments or financing comparisons raised in public debate.
Calls for accountability
The New York City comptroller urged Anthropic to pause its planned IPO until it addresses AI safety, governance and development-pace concerns transparently. 1 Senator Elizabeth Warren separately called for a pause in advanced AI development. In a letter, she described a draft federal framework that would have required a 60-day government evaluation before limited release, followed by another 75-day access period for selected users.
These interventions show that the debate is not just about whether new models appeared. It is also about who can assess their risks, what information companies disclose and whether public oversight should precede wider deployment.
What the public safeguards do—and don’t—show
Amodei and other industry leaders supported giving outside organizations access to AI systems for safety evaluation, according to Reuters’ account of the September calls. 19 Amodei’s essay also called for a slower pace of capability development so safety measures could catch up.
Those statements describe proposed safeguards and goals. They do not, by themselves, demonstrate that independent evaluators had effective oversight of subsequent releases or that development was meaningfully constrained. The available sources also do not establish the details of particular pauses, monitoring arrangements or OpenAI’s reported October statement.
The evidence supports a measured conclusion: public calls to slow frontier AI development were followed by reports of continued, more capable model releases, while Anthropic moved toward a public offering. That is a real accountability question—but the available reporting does not quantify any slowdown or prove that fundraising or releases violated a specific commitment.
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Six weeks after prominent AI leaders endorsed slowing development, Anthropic, OpenAI, Google and SpaceX were reported to have released more capable models.
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Six weeks after prominent AI leaders endorsed slowing development, Anthropic, OpenAI, Google and SpaceX were reported to have released more capable models. Anthropic filed for an IPO on October 26, 2026, and its prospectus reported $16.3 billion in revenue.
Sources
nytimes.comTop A.I. Leaders Call for Slowing Down A.I. Development
anthropic.comAnthropic files S-1 with the SEC for proposed initial public offering
fortune.comAnthropic’s IPO prospectus shows $16.3 billion in revenue, an $80.7 billion net loss, and goal of an 'age of miracles' | Fortune
comptroller.nyc.govLetter to Anthropic Re: Planned Initial Public Offering