At the close, the Dow Jones Industrial Average rose 0.1 percent, while the broad S&P 500 index fell 0.2 percent and the tech-heavy Nasdaq Composite Index fell 0.7 percent.
Several AI-linked major technology companies fell, including Amazon and Tesla.
Software giant Microsoft fell 10 percent after its quarterly report, which was released after markets closed Wednesday.
Meta, Facebook's parent company, climbed 10.4 percent after reporting.
Southwest Airlines jumped 18.7 percent after issuing a full-year profit forecast.
iPhone maker Apple is expected to release its quarterly report after markets close on Thursday. Its stock closed up 0.7 percent.
