v3.25.1
Cover - shares
 3 Months Ended
Mar. 31, 2025
May 09, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-40583  
Registrant Name Oklo Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-2292473  
Entity Address, Address Line One 3190 Coronado Dr.  
Entity Address, City or Town Santa Clara  
Entity Address, State or Province CA  
City Area Code 650  
Local Phone Number 550-0127  
Entity Address, Postal Zip Code 95054  
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol OKLO  
Security Exchange Name NYSE  
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   139,205,199
Document Fiscal Year Focus 2025  
Central Index Key 0001849056  
Amendment Flag false  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --12-31