Not exactly golfed to death, but:
@files = qw(model4run1 model2run1 model4run2 model1run1);
$x++,"$files[0] "=~/(.{$x})/ while (grep/^$1/,@files)==@files;
chop($_=$1);
print;

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In reply to Re: Find common prefix from a list of strings by qmole
in thread Find common prefix from a list of strings by Albannach

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