Exhibit 16.1

February 10, 2022

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC  20549

Commissioners:

We have read the statements made by Cepton, Inc. (formerly Growth Capital Acquisition Corp.) under Item 4.01 of its Form 8-K dated February 10, 2022.  We agree with the statements concerning our Firm in such Form 8-K; we are not in a position to agree or disagree with other statements of Cepton, Inc. (formerly Growth Capital Acquisition Corp.) contained therein.

Very truly yours,

/s/Marcum LLP

Marcum LLP