Stata commands sem, introduced in Stata 12, and gsem, introduced in Stata 13 are very powerful and flexible. However, they differ on which options are allowed. The table below gives the options for each of the two commands.
sem gsem Estimation Methods ml X X mlmv X qml X X adf X Misc Options multiple group X teffects X standardize X survey X summary statistics X factor variables X multilevel X Estimation Shorthand regress X X logit X probit X cloglog X ologit X oprobit X ocloglog X poisson X nbreg X gamma X mlogit X Estimation Families Gaussian * X Bernoulli X binomial X multinomial X gamma X negative binomial X ordinal X poisson X Estimation Links identity * X log X logit X probit X cloglog X * implicit