Anthropic stands alone in AI policy fights, yet remains world's most valuable AI startup

Anthropic is isolated in every AI fight, and winning anyway

Anthropic spent the winter as the darling of America's AI boom. By summer it is the odd one out in nearly every policy fight: alone on open weights, blacklisted by the Pentagon, and an awkward messenger on distillation. It is also still the most valuable startup in the world, and the two things are connected. Six months ago, Anthropic was the darling of America's AI boom. It led on the models and was loudest on the ethics. This summer, it finds itself alone. The Claude maker is now the odd one out in nearly every big AI policy fight, Axios reported. It is the most valuable startup in the world, and at the same time the most isolated lab in the industry. The two facts turn out to be connected. Alone on open weights The clearest sign came last week. Anthropic was the only frontier lab that declined to sign an open letter urging Washington not to restrict open-weight models. Nvidia's Jensen Huang led it. Google and OpenAI, its two closest rivals, both signed. That left Anthropic defending tighter controls on the very business model all three still lean on. Dario Amodei tried to calm the row himself. In a blog post, Anthropic's chief executive insisted the company has never called for banning open models. He even called weaker ones "a public good." He still did not sign. He also held his line that the dangerous ingredients, chiefly advanced chips reaching authoritarian states, need tighter control. Isolated on every other front too The pattern repeats across the board. The Pentagon blacklisted Anthropic in February, after a fight over whether Claude could be used for surveillance or autonomous weapons. One senior defence official said on Friday there was "no AI company more hostile to the warfighter." On safety, Anthropic has pushed harder than anyone. It has backed state AI laws and floated an FAA-style regulator to vet models before release. Yet when the White House flagged a security flaw this summer, Anthropic disputed how serious it was. The row helped trigger export controls that forced two of its models offline for nearly three weeks. Then there is distillation. Anthropic has accused Chinese labs of training cheaper models on Claude's outputs in "industrial-scale" campaigns, the New York Times reported. Critics call distillation a normal part of AI development. They also note the awkward timing. Anthropic had just settled a $1.5bn copyright lawsuit over pirated books used to train its own models. Alone, and winning anyway The isolation is not total. Anthropic did join more than 1,100 employees from rival labs this week in a petition urging Washington to help "deliberately pace" frontier AI. Its central worry, that the technology is moving faster than anyone can safely steer it, is now shared across the industry. And for all the friction, Anthropic is not losing. Its models still top most independent benchmarks, and enterprises keep paying premium prices despite the grumbling over cost and restrictions. It reached a $965bn valuation in May, ahead of OpenAI, and is heading for an IPO that could value it higher still. The traits that strand it in every policy fight, caution and a refusal to bend, are the same ones that built its lead. Anthropic would rather be right than liked, and for now it can afford to be.

Anthropic's lonely island

Why it matters: Anthropic is simultaneously the world's most valuable startup and its most isolated AI leader. The company's idiosyncrasies have strained its relationship with developers, policymakers and partners as it barrels toward a potential trillion-dollar IPO. Driving the news: Anthropic is the only frontier AI lab that declined to sign an open letter led by Nvidia CEO Jensen Huang urging Washington not to restrict open-weight models, a category currently dominated by China. * Open-weight models are downloadable systems that users can run, modify and build on without paying for a company-controlled interface -- making them cheaper and more flexible, but also harder to control once released. * Google and OpenAI, Anthropic's two biggest closed-model rivals, joined dozens of other signatories over the weekend, leaving Anthropic alone in defending the business model all three companies still depend on. What they're saying: Anthropic CEO Dario Amodei tried to defuse the fight himself on Monday, publishing a blog post insisting Anthropic has never called for banning open models -- while still not signing onto the letter. * Amodei called less capable open models "a public good" and said banning U.S. companies from using Chinese open models would do little to stop hostile governments or bad actors. * But he doubled down on the need for tighter controls on the ingredients and behaviors that could make powerful models dangerous, including advanced chips flowing to authoritarian governments. Between the lines: The open-weight controversy captures the new bad blood roiling Silicon Valley, where style and posture matter just as much as policy. * Anthropic is more willing than its chief competitor, OpenAI, to be openly confrontational, even when the two companies are not always that far apart intellectually or commercially. Zoom out: As the AI race accelerates, the company is growing isolated across nearly every major policy fight: * 🪖 Military use: The Pentagon blacklisted Anthropic in February after a bitter fight over whether Claude could be used for mass surveillance or autonomous weapons. Top Pentagon official Emil Michael lashed out at Anthropic on Friday -- claiming "there is no AI company more hostile to the warfighter." * ⚠️ Guardrails: No lab has pushed harder for regulation than Anthropic, which has backed state-level AI laws and proposed an FAA-style regulator to screen advanced models before release. But when the White House flagged a security vulnerability this summer, Anthropic disputed how serious it was -- triggering export controls that forced its Fable and Mythos models offline for nearly three weeks. * 🧑🔬 Distillation: Anthropic has accused Chinese labs of training their lower-cost models on Claude's outputs via "industrial-scale distillation campaigns." Critics counter that distillation is a standard part of AI development -- and that Anthropic is an awkward messenger after settling a $1.5 billion copyright lawsuit over pirated books. The other side: Anthropic joined more than 1,100 AI employees from OpenAI, Google DeepMind, Meta and other rivals in a separate petition Tuesday urging the U.S. government to help develop tools to "deliberately pace" frontier AI development. * The letter shows that despite its isolation, Anthropic's top concern -- that frontier AI is moving faster than industry or government can safely control -- is increasingly shared across the labs racing to build it. Reality check: For all the noise, Anthropic remains in an extraordinarily strong position -- arguably the strongest of any AI lab in the world. * Its models still rank at the top of most independent benchmarks, and enterprise customers keep paying premium prices despite the backlash over cost and restrictions. * The company hit a $965 billion valuation in May, ahead of OpenAI, and is preparing for an IPO that could value it even higher. For the record: In response to a request for comment, Anthropic pointed to Amodei's blog post defending its stance on the key issues. The bottom line: The same qualities driving Anthropic's isolation -- caution, refusal to bend, insistence on being right rather than liked -- are the ones that helped establish its lead in the first place.