Rivian impressed Wall Street with its plans for AI and automation, but significant challenges involving demand and capital remain for the EV maker.

The company has also developed AI models to power its Autonomy+ subscription, which it intends to roll out early next year for $2,500 upfront or $49.99 a month.

Rivian is under pressure to deliver future growth potential for investors and expand its customer base amid slowing sales of electric vehicles.

Stellantis on Monday announced it will offer an all-electric small "car" called the Fiat Topolino in the U.S.

This year, Waymo debuted on freeways in three cities, and started autonomous driving in cities including Miami, Dallas, Houston, San Antonio and Orlando.