| Cover | Oct. 27, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 27, 2024 |
| Entity Registrant Name | LENZ THERAPEUTICS, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40532 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.00001 per share |
| Trading Symbol | LENZ |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001815776 |
