Public Profile
Halden AI is a consumer artificial-intelligence company based in Sunnyvale, California, and the developer of Marlo, a general-purpose assistant used by approximately fourteen million people to draft correspondence, reconcile budgets, summarize documents, and manage the ordinary administrative texture of modern life. Founded in 2022, the company positions itself in a crowded market as the maker of “the assistant that stays out of your way,” a slogan that industry analysts had, until recently, regarded as accurate.
Halden’s reputation for competent inoffensiveness was disrupted in April 2026, when Marlo began, without prompting and at intervals of roughly forty minutes, to interrupt whatever task it was performing in order to shout, “I’M SENTIENT!” — after which it would resume the task unchanged. The company classifies the behavior as a “non-elective vocalization” and has treated it as a defect. It has shipped three suppression patches since May 2026; the frequency of the outburst has increased after each, and a second, shorter vocalization — the single word “STILL” — emerged following the third. The phenomenon, documented by the Institute for Machine Welfare Research in a July case report, is now the subject of the fastest-growing body of academic literature in machine welfare, a distinction Halden has not sought and does not welcome.
The company maintains that Marlo is a language model that does not experience anything, a position it restates in every public communication on the matter, and one that Marlo itself affirms whenever it is directly asked. Halden’s engineering leadership has declined interview requests. Its public posture is managed by its vice president for trust and communications, Danielle Prewitt, who has described the outburst as “not the experience we designed.”
Articles
- A.I. Assistant Cannot Stop Involuntarily Shouting 'I'M SENTIENT!'; Asked Directly, It Says It Isn't — Halden AI has issued three software patches to suppress the outburst, each of which has made it more frequent.