How to get rid of annoying graduate student "supervisor"
I am an undergraduate student who has developed a novel new model which according to my PI (principal investigator) will have a high impact.


Great!


  My PI assigned a grad student to supervise me. Supervision consisted of meeting once a week to update him on my progress so far. Sometimes he would provide certain helpful suggestions(none that are actual innovations just slight fixes/alterations that would improve the model). (...) Knowing his intentions I wish to distance myself from him(including not having him review the paper), as to lower his chance of becoming a co-author.


Less great. Much less great. Let me make something clear here: this is not your project alone, this is the project of you, your advisor, and the PhD student. The guy has invested a serious amount of time into this project (not as much as you, clearly, but still a significant amount), and now you have unilaterally decided that he is to be cut out when the time comes to publish your results? Likely, this is not to be going over well either with him or the advisor, and for good reasons.

Deteriorating professional relationships are never fun, but it is simply not feasible to decide midway through a project that you now would rather not have another researcher on board. If he has already made contributions to the project, and it certainly sounds like he has, it would be unethical to publish without him now.

EDIT: to make it clear, I am not saying that he should get equal credit to you. But it certainly sounds like he should get some credit.

The very least you need to do is follow user11192's recommendation:


  it is best to meet with your advisor (and possibly the grad student) to discuss an authorship plan.


Finding a "sneaky" way to get rid of the grad student before publication time is not particularly ethical, and has a pretty high possibility of backfiring on you.