Betta Fish: Houdini

Never in my years of betta keeping have I ever had one simply disappear. I got a new betta Saturday and acclimated him to a 5 gallon, heavily planted tank with 2 shrimp and multiple snail companions. (This tank had been cycling for almost a year so it was pretty ready for the addition of a fish). I did everything right and ensured my water parameters were good and the temperature was 78 and made sure to slowly acclimate him to both the new water and temp. When I let him go in the tank he was perfect. Swimming around, checking the surroundings, and even ate. Everything was going so well. Monday morning I turn on the light, drop a couple pellets in, and leave for work. I get home and go to turn off his lights and see how much he ate and hes gone. Nowhere to be seen. I ended up taking everything out of the tank. Every single plant and looking through them. Nothing. There was a small gap in the glass and him being a pretty tiny betta he maybe could've jumped through. But he wasn't swimming erratically the past 2 days he was pretty calm. I can't understand why he would have jumped out because the water seemed perfect. I looked around my entire kitchen and even into the living room. Nothing. No water splashes. No dry fish. Its possible my dog could have got to him before me but I would think it would be messy. There's simply nothing. Like he went through 60 million years of evolution overnight, sprouted legs, and walked out the door. I didn't get enough time with him to give him a proper name, however I have decided to name him Houdini. The one fish thats ever absolutely swindled me.