Feature generated editing suggestions inspired by well-known authors and academics, prompting a class-action lawsuit over the use of real names without consent

Grammarly has disabled a controversial AI feature that imitated the style of prominent writers and academics, and is facing a multimillion dollar lawsuit from those whose identities were used without consent.

The feature, called Expert Review, used generative AI to produce feedback supposedly inspired by writers including the novelist Stephen King, the astrophysicist and author Neil deGrasse Tyson, and the late scientist Carl Sagan.

A class-action lawsuit has been filed in the southern district of New York against Superhuman, Grammarly’s parent company. The lawsuit argues that using a person’s name for commercial gain without permission is unlawful, and argues that damages due across the plaintiff class are in excess of $5m (£3.7m).

Since Grammarly’s feature has come to public attention, a number of writers have spoken out about being included.