1 and 2 are common, and equivalent.
#3 means that it was necessary to stay -- not leave.
#4 would get raised eyebrows and a "huh?"
1. She didn't need to leave early.
2. She didn't have to leave early.
3. She needed not to leave early.
4. She had not to leave early.
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Are they all the same and grammatical? Do you use #4 often?
1 answer