The warning and what it rests on

The statement, described in the claim as a joint alert from AI luminaries that "loss of humanity's control is imminent," was reviewed against three primary sources. Those sources substantiate the core elements of the claim: that a joint warning was issued, that it came from leading figures in the AI field, and that it centers on the risk of humanity losing control over advanced AI systems.

The factual skeleton of the claim — who warned, what they warned about, and in what form — is supported by the available material. What remains less certain is the framing of "imminence." Whether the leading experts agree on a specific timeline, and how broad the consensus behind the warning actually is, cannot be fully established from the sources examined.

Where the claim is on firmer and shakier ground

The claim accurately conveys that a coordinated warning exists and that it concerns loss of human control over AI. At the same time, characterizations such as "imminent" reflect the alarmist tone of the warning itself rather than an independently established timeline, and readers should treat the urgency framing as the experts' own assessment rather than a settled fact.

Verdict: Mostly True