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Document And Entity Information
Nov. 11, 2025
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Nov. 11, 2025
Entity Registrant Name Blaize Holdings, Inc.
Entity Central Index Key 0001871638
Entity Emerging Growth Company true
Entity File Number 001-41139
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 86-2708752
Entity Address, Address Line One 4659 Golden Foothill Parkway, Suite 206
Entity Address, City or Town El Dorado Hills
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95762
City Area Code 916
Local Phone Number 347-0050
Entity Information, Former Legal or Registered Name N/A
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Ex Transition Period false
Warrants Each Whole Warrant Exercisable For One Share Of Common Stock At An Exercise Price Of 11.50 Per Share 1 [Member]  
Document Information [Line Items]  
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Trading Symbol BZAIW
Security Exchange Name NASDAQ
Common Stock Par Value 0.0001 Per Share 2 [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common stock, par value $0.0001 per share
Trading Symbol BZAI
Security Exchange Name NASDAQ