Exhibit 5.1

morrison & foerster llp   beijing, berlin, boston, brussels, denver, hong kong, london, los angeles, new york, northern virginia, palo alto, san diego, san francisco, shanghai, singapore, tokyo, washington, d.c.

February 8, 2021

Board of Directors

Anzu Special Acquisition Corp I
12610 Race Track Road, Suite 250,

Tampa, FL 33626

Re: Registration Statement on Form S-1

Ladies and Gentlemen:

We are acting as counsel to Anzu Special Acquisition Corp I, a Delaware corporation (the “Company”), in connection with its registration statement on Form S-1, as amended (the “Registration Statement”), filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), relating to the registration under the Securities Act of the issuance of (i) up to 28,750,000 units of the Company (the “Units”), including Units that may be sold pursuant to the underwriter’s over-allotment option to purchase additional Units, with each such Unit consisting of one share of Class A common stock of the Company, $0.0001 par value per share (“Common Stock”), and one-half of one warrant of the Company to purchase a share of Common Stock (each whole warrant, a “Warrant”) and (ii) all shares of Common Stock (the “Unit Shares”) and all Warrants issuable as part of the Units, as specified in the Registration Statement. All of such Units are to be sold by the Company pursuant to the proposed form of Underwriting Agreement between the Company and the underwriter named therein filed as Exhibit 1.1 to the Registration Statement (the “Underwriting Agreement”). The Warrants shall be governed under the terms of a Warrant Agreement (the “Warrant Agreement”) by and between the Company and American Stock Transfer & Trust Company, LLC.

As counsel for the Company, we have examined originals or copies, certified or otherwise identified to our satisfaction, of such documents, corporate records, certificates of public officials and other instruments as we have deemed necessary for the purposes of rendering this opinion and we are familiar with the proceedings taken and proposed to be taken by the Company in connection with the authorization, issuance and sale of the Units, the Unit Shares and the Warrants. In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity with the originals of all documents submitted to us as copies. As to all matters of fact, we have relied on the representations and statements of fact made in the documents so reviewed, and we have not independently established or verified the facts so relied on. This opinion letter is given, and all statements herein are made, in the context of the foregoing.

Board of Directors

Anzu Special Acquisition Corp I
February 8, 2021
Page Two

This opinion letter is based as to matters of law solely on the General Corporation Law of the State of Delaware as currently in effect, and, with respect to the Units and Warrants, the laws of the State of New York as currently in effect. We express no opinion as to the enforceability of the New York choice-of-law provision contained in the Warrant Agreement. We express no opinion herein as to any other laws, statutes, ordinances, rules, or regulations.

Based upon the foregoing, and subject to the assumptions, limitations and qualifications stated herein, we are of the opinion that:

Our opinions expressed herein are subject to the following qualifications and exceptions:

Board of Directors

Anzu Special Acquisition Corp I
February 8, 2021
Page Three

This opinion letter has been prepared for use in connection with the Registration Statement. We assume no obligation to advise you of any changes in the foregoing subsequent to the effective date of the Registration Statement.

We hereby consent to the filing of this opinion as Exhibit 5.1 to the Registration Statement and to the reference of our firm under the caption “Legal Matters” in the prospectus forming a part of the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act.