ModelTeller will return the best model, and the ranking of alternative models among the following 24 nucleotide substitution models:

- Jukes and Cantor 1969 (
**JC**)
- Felsenstein 1981 (
**F81**)
- Kimura two parameters 1980 (
**K2P**)
- Hasegawa-Kishino-Yano 1985 (
**HKY**)
- The generalized symmetrical model, Zharkikh, 1994 (
**SYM**)
- General Time Reversible, Tavare 1986 (
**GTR**)

combined with the proportion of invariable sites (

**+I**), rate heterogeneity across sites (

**+G**), or both (

**+I+G**).