v3.26.1
Cover - USD ($)
12 Months Ended
Dec. 31, 2025
Mar. 26, 2026
Jun. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block] None.    
Entity Registrant Name GSR IV Acquisition Corp.    
Entity Central Index Key 0002072404    
Entity File Number 001-42821    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company true    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Public Float     $ 236,318,445
Entity Address, Address Line One 5900 Balcones Drive    
Entity Address, Address Line Two Suite 100    
Entity Address, City or Town Austin    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 78731    
City Area Code 914    
Local Phone Number 369-4400    
Units, each consisting of one Class A ordinary share and one seventh of one right      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one seventh of one right    
Trading Symbol GSRFU    
Security Exchange Name NASDAQ    
Class A ordinary share, par value $0.0001 per share      
Document Information [Line Items]      
Title of 12(b) Security Class A ordinary share, par value $0.0001 per share    
Trading Symbol GSRF    
Security Exchange Name NASDAQ    
Rights, each whole right entitling the holder to receive one Class A ordinary share      
Document Information [Line Items]      
Title of 12(b) Security Rights, each whole right entitling the holder to receive one Class A ordinary share    
Trading Symbol GSRFR    
Security Exchange Name NASDAQ    
Class A Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   23,655,500  
Class B Ordinary Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   5,750,000