There's at least three major things that have been described as safety:
1) Won't end humanity. 2) Won't tell users to kill themselves. 3) Won't leak your corporate secrets to competitors.
1) Won't end humanity. 2) Won't tell users to kill themselves. 3) Won't leak your corporate secrets to competitors.
Also "won't accurately produce unabridged copies of popular fiction novels" and "will incorrectly tell users that HIV is not present in human saliva".
"safety" means a lot of things to a lot of people.