Andrew Left recently revealed a short position in Palantir, citing its huge valuation.Since then, his firm, Citron Research, has reiterated and fleshed out its bearish stance.In a new note, it uses OpenAI's latest valuation to illustrate why it sees Palantir as too pricey.

Short-seller Citron targets Palantir, arguing the AI stock is overvalued. Find out why OpenAI's valuation suggests a "generous" $40 price.

Andrew Left argues that investors have overhyped Palantir stock, and its valuation pales in comparison to a true AI leader like OpenAI.