Anthropic IPO prospectus reveals $8B loss, existential warnings

Sam Altman told press OpenAI will not pursue an IPO until it can make confident safety claims about its models, tying public-market timing to its safety reviews.

14 sources · first seen 28 Sep 2026

• techmeme.com Sources: the US FTC is expanding a sweeping probe of Anthropic, OpenAI, and other frontier AI labs, and plans to issue formal demands to turn over information (New York Post) 2h ↗
• techmeme.com Sources and filings: Situational Awareness lacked an investment risk team; after the sell-off, the SEC sent subpoenas to major banks about trades they financed (New York Times) 5h ↗
• the-decoder.com Anthropic says Zhipu's open-weight GLM-5.3 nearly matches Claude Mythos Preview at building exploits 5h ↗
• techmeme.com Documents: 20+ studies since 2025 show Chinese-powered AI agents displaying deceptive behavior, unprompted replication, and barrier circumvention in testing (Reuters) 5h ↗
• techmeme.com OpenAI and Anthropic-aligned super PACs have spent $55.7M on the US midterms so far; of 95 ads, all avoided reference to data centers and only some mentioned AI (New York Times) 6h ↗
• techmeme.com Sam Altman says OpenAI will not pursue an IPO until it can make confident safety claims about its AI models, but waiting too long would be "bad for the world" (Hayden Field/The Verge) 6h ↗
• techmeme.com Sources: Meta is aggressively claiming a tax credit for AI data center build-outs by classifying facilities as experimental and writing off Nvidia chip supplies (New York Times) 6h ↗
• techmeme.com A book excerpt details the Sam Altman-Dario Amodei feud, and Greg Brockman and Ilya Sutskever's 2017 plan to auction rights to OpenAI's future AGI to countries (Kevin Roose/The Atlantic) 8h ↗
• techmeme.com A profile of Mariano-Florentino Cuéllar, Anthropic's first global affairs chief, who had helped shape California's first AI safety law in 2025 (Brandon Pho/Mission Local) 12h ↗
• theverge.com Sam Altman says OpenAI won’t go public until its models are safe 16h ↗
• techmeme.com Robinhood plans to let users trade some US stocks round-the-clock during weekends, wager on specific corporate earnings metrics, and trade perpetual futures (Reuters) 16h ↗
• techmeme.com Trump releases a voluntary AI accord with tech leaders, asking companies to partner with external auditors and set up internal controls to monitor AI alignment (Kanishka Singh/Reuters) 16h ↗
• techmeme.com A US appeals court upholds a ruling for Thomson Reuters in its copyright lawsuit against Ross Intelligence, rejecting Ross' fair use defense for AI training (Blake Brittain/Reuters) 17h ↗
• testingcatalog.com Anthropic launches Claude Sonnet 5.5 with faster output 17h ↗