Fool.com contributor Parkev Tatevosian discusses the key innovations provided by Tesla (TSLA 0.01%), Palantir (PLTR 1.94%), Amazon (AMZN 3.20%), and C3.ai (AI 2.03%) in artificial intelligence (AI). He compares the four AI stocks on financial metrics, including valuation, to determine the best stock to buy.

*Stock prices used were the afternoon prices of Oct. 17, 2023. The video was published on Oct. 18, 2023.