Will a betta be ok in my tank?

i have a 15 gallon tank with 5 guppies, 1 neon and 1 glofish (please dont pester me about my 1 neon and 1 glofish because i had 5 of each then they all died) i want to know if a betta would be ok in here? thanks oh and i have about 10 baby guppies in the tank two but there like 1 cm. big right now so there not that big...would it be ok?