Exhibit 5.1

	99 Bishopsgate London EC2M 3XF United Kingdom Tel: +44(0)20.7710.1000 Fax: +44(0)20.7374.4460 www.lw.com
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Cipher Mining Inc.

1 Vanderbilt Avenue, Floor 54, Suite C

New York, New York 10017

Re: Registration Statement on Form S-3 (No. 333-267537); 2,397,424 shares of common stock, $0.001 par value per share

To the addressee set forth above:

We have acted as special counsel to Cipher Mining Inc., a Delaware corporation (the “Company”), in connection with the issuance of 2,397,424 shares (the “Shares”) of common stock, par value $0.001 per share, of the Company (the “Common Stock”). The Shares are included in a registration statement on Form S-3 under the Securities Act of 1933, as amended (the “Act”), filed with the Securities and Exchange Commission (the “Commission”) on September 21, 2022 (Registration No. 333-267537) (as so filed and as amended, the “Registration Statement”), a base prospectus dated October 7, 2022 (the “Base Prospectus”), a prospectus supplement dated August 4, 2023 (the “FirstProspectus Supplement”), and a prospectus supplement dated November 8, 2023 (the “Second Prospectus Supplement” and, together with the Base Prospectus and the First Prospectus Supplement, the “Prospectus”). The Shares are being sold pursuant to a purchase and sale agreement dated as of November 6, 2023 by and between the Company, Cipher Black Pearl LLC, a wholly-owned subsidiary of the Company and Trinity Mining Group, Inc. (the “Purchase and Sale Agreement”). This opinion is being furnished in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as to any matter pertaining to the contents of

Latham & Watkins is the business name of Latham & Watkins (London) LLP, a registered limited liability partnership organised under the laws of New York and authorised and regulated by the Solicitors Regulation Authority (SRA No. 203820). A list of the names of the partners of Latham & Watkins (London) LLP is open to inspection at its principal place of business, 99 Bishopsgate, London EC2M 3XF, and such persons are either solicitors, registered foreign lawyers, or managers authorised by the SRA. We are affiliated with the firm Latham & Watkins LLP, a limited liability partnership organised under the laws of Delaware.

December 8, 2023

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the Registration Statement or related Prospectus, other than as expressly stated herein with respect to the issue of the Shares (as defined below).

As such counsel, we have examined such matters of fact and questions of law as we have considered appropriate for purposes of this letter. With your consent, we have relied upon certificates and other assurances of officers of the Company and others as to factual matters without having independently verified such factual matters. We are opining herein as to the General Corporation Law of the State of Delaware (the “DGCL”), and we express no opinion with respect to any other laws.

Subject to the foregoing and the other matters set forth herein, it is our opinion that, as of the date hereof, when the Shares shall have been duly registered on the books of the transfer agent and registrar therefor in the name or on behalf of the purchaser, and have been issued by the Company against payment therefor (not less than par value) in the circumstances contemplated by the Purchase and Sale Agreement, the issue and sale of the Shares will have been duly authorized by all necessary corporate action of the Company, and the Shares will be validly issued, fully paid and nonassessable. In rendering the foregoing opinion, we have assumed that the Company will comply with all applicable notice requirements regarding uncertificated shares provided in the DGCL.

Our opinion is subject to: (i) the effect of bankruptcy, insolvency, reorganization, preference, fraudulent transfer, moratorium or other similar laws relating to or affecting the rights and remedies of creditors; (ii) (a) the effect of general principles of equity, whether considered in a proceeding in equity or at law (including the possible unavailability of specific performance or injunctive relief), (b) concepts of materiality, reasonableness, good faith and fair dealing, and (c) the discretion of the court before which a proceeding is brought; and (iii) the invalidity under certain circumstances under law or court decisions of provisions providing for the indemnification of or contribution to a party with respect to a liability where such indemnification or contribution is contrary to public policy. We express no opinion as to (a) any provision for liquidated damages, default interest, late charges, monetary penalties, make-whole premiums or other economic remedies to the extent such provisions are deemed to constitute a penalty; (b) consents to, or restrictions upon, governing law, jurisdiction, venue, arbitration, remedies, or judicial relief; (c) any provision requiring the payment of attorneys’ fees, where such payment is contrary to law or public policy; (d) other applicable exceptions; and (e) the severability, if invalid, of provisions to the foregoing effect.

This opinion is for your benefit in connection with the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act. We consent to your filing this opinion as an exhibit to the Company’s Form 8-K dated December 8, 2023 and to the reference to our firm in the Prospectus under the heading “Legal Matters.” 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 Act or the rules and regulations of the Commission thereunder.

December 8, 2023

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Sincerely,

/s/ Latham & Watkins LLP