On the commission free close of a sold contract, Fidelity will do this at .65 and under. Pretty sure that eTrade is also .65 and lower. A pretty big window really for that commission free close.FWIW, there are some platforms that will actually let you close a contract commission free if its value is under like 5 cents. They don't want the hassle of assignment either, plus they want to open your capital back up to other positions.
My only caution there is I've learned not to chase the .65 premium level too hard. A commission free trade is nice - carrying a position a day longer that then moves a lot against you - ugh (ask me how I know ).