| Cover | May 14, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 14, 2024 |
| Entity Registrant Name | ALTO NEUROSCIENCE, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-41944 |
| Entity Tax Identification Number | 83-4210124 |
| Entity Address, Address Line One | 369 South San Antonio Road |
| Entity Address, City or Town | Los Altos |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94022 |
| City Area Code | 650 |
| Local Phone Number | 200-0412 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value per share |
| Trading Symbol | ANRO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001999480 |
| Amendment Flag | false |
