Rivian Automotive ( RIVN 6.11% ) held its first "Autonomy and AI Day" today in Palo Alto, CA, and so far, it appears that analysts and investors have been underwhelmed. CEO R.J. Scaringe impressed the audience by announcing the company's first in-house Rivian autonomy processor, but shares still dove as much as 10% today anyway.

As of 3:22 p.m. ET, with more investors likely watching the presentation's webcast replay, the stock rebounded somewhat but remained lower by 4.5%.

Rivian's in-house AI

The core of Rivian's autonomy platform will be the EV maker's artificial intelligence (AI) processors developed in-house. The company's advanced driver-assistance system will continuously improve using data from the EV maker's deployed fleet of vehicles.

Starting in late 2026, Rivian's th

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