Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2026	May 07, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-41955
Entity Registrant Name	BRIDGEBIO ONCOLOGY THERAPEUTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	256 E. Grand Avenue
Entity Address, Address Line Two	Suite 104
Entity Address, City or Town	South San Francisco
Entity Address, State or Province	CA
Entity Tax Identification Number	39-3690783
Entity Address, Postal Zip Code	94080
City Area Code	650
Local Phone Number	405-4770
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	BBOT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Small Business	true
Entity Ex Transition Period	false
Entity Shell Company	false
Amendment Flag	false
Document Period End Date	Mar. 31, 2026
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001869105
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		80,107,104