AdvertisementSKIP ADVERTISEMENTYou have a preview view of this article while we are checking your access. When we have confirmed access, the full article content will load.Funding for A.I. firms made up nearly half the $56 billion in U.S. start-up financing from April to June, according to PitchBook.A.I. companies have attracted increasingly large rounds of funding after OpenAI, shown here, released ChatGPT in 2022. Credit...Jim Wilson/The New York TimesJuly 3, 2024, 12:01 a.m. ETFor two years,...