Cover - shares	9 Months Ended
	Sep. 30, 2025	Oct. 30, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-40532
Entity Registrant Name	LENZ THERAPEUTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-4867570
Entity Address, Address Line One	201 Lomas Santa Fe Dr., Suite 300
Entity Address, City or Town	Solana Beach
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92075
City Area Code	858
Local Phone Number	925-7000
Title of 12(b) Security	Common Stock, par value $0.00001 per share
Trading Symbol	LENZ
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		31,289,969
Entity Central Index Key	0001815776
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Amendment Flag	false