| Document and Entity Information | Jan. 13, 2025 |
| Document And Entity Information [Line Items] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Jan. 13, 2025 |
| Entity Registrant Name | Blaize Holdings, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-41139 |
| Entity Tax Identification Number | 86-2708752 |
| Entity Address Address Line 1 | 4659 Golden Foothill Parkway |
| Entity Address Address Line 2 | 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 | BurTech Acquisition Corp. |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Description | This Current Report on Form 8-K/A amends and restates in its entirety Item 4.01 of the Current Report on Form 8-K filed with the Securities and Exchange Commission (the “SEC”) on January 17, 2025, solely to clarify certain reportable events as defined in Item 304(a)(1)(v) of Regulation S-K with respect to the consolidated financial statements of BurTech Acquisition Corp. and to filed a revised Letter from Marcum LLP to the Securities and Exchange Commission as Exhibit 16.1. |
| Entity Central Index Key | 0001871638 |
| Former Address [Member] | |
| Document And Entity Information [Line Items] | |
| Entity Address Address Line 1 | 1300 Pennsylvania Ave NW |
| Entity Address Address Line 2 | Suite 700 |
| Entity Address City Or Town | Washington |
| Entity Address State Or Province | DC |
| Entity Address Postal Zip Code | 20004 |
| Common stock, par value $0.0001 per share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common stock, par value $0.0001 per share |
| Trading Symbol | BZAI |
| Security Exchange Name | NASDAQ |
| Warrants, each whole warrant exercisable for one share of Common stock at an exercise price of $11.50 per share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 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 |
