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Cover
 9 Months Ended
Sep. 30, 2025
Document Information [Line Items]  
Document Type S-1/A
Entity Registrant Name KODIAK AI, INC.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 98-1592112
Entity Address, Address Line One 1049 Terra Bella Avenue
Entity Address, Address Line Two Mountain View
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94043
City Area Code 650
Local Phone Number 209-8005
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Central Index Key 0001853138
Amendment Flag true
Entity Primary SIC Number 7373
Amendment Description The Registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.
Business Contact [Member]  
Document Information [Line Items]  
Contact Personnel Name Jordan Coleman
Entity Address, Address Line One 1049 Terra Bella Avenue
Entity Address, Address Line Two Mountain View
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94043
City Area Code 650
Local Phone Number 209-8005