Cover Page - shares	9 Months Ended
	Sep. 30, 2025	Nov. 03, 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	001-42706
Entity Registrant Name	CARIS LIFE SCIENCES, INC.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	85-2077369
Entity Address, Address Line One	750 W. John Carpenter Freeway
Entity Address, Address Line Two	Suite 800
Entity Address, City or Town	Irving
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75039
City Area Code	866
Local Phone Number	771-8946
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	CAI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		282,146,923
Entity Central Index Key	0002019410
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2025
Amendment Flag	false