Rivian's 2026.15 software update brings Rivian Assistant, an AI agent built on Google Gemini that goes further than anything Tesla's Grok integration currently offers in a production vehicle. Where most in-car AI handles questions and navigation suggestions, Rivian's version actually controls the vehicle. Say "switch to snow mode" and it switches. Ask it to lower the ride height, heat specific seats, or navigate to Miami with charging stops included, and it will try. The system uses wake words "Hey Rivian" or "Ok Rivian," integrates with Google Calendar, and can read and reply to SMS messages through a connected phone. It is the most capable hands-free assistant available in any production EV right now, and it requires a Connect Plus subscription at $15 per month to access.
Rivian Assistant arrives at a moment when in-car AI is becoming a genuine differentiator rather than a novelty. Tesla has Grok integration available to owners but the current version focuses primarily on general questions rather than vehicle control. Mercedes, BMW, and Volkswagen have fielded their own AI assistants that handle infotainment and navigation but stop short of changing drive modes or composing text messages. Rivian's command surface is broader than any of them: drive mode changes, ride height, ride feel, seat heat for individual seats, app switching, audio source selection, and bug reporting by voice. Rivian has confirmed a lighter version of the assistant is in development that will include messaging capability without a monthly fee. The full version, which covers all vehicle commands and location services, will remain a paid tier.
The demo from RivianTrackr runs through roughly 25 minutes of live testing on an R1S. Vehicle commands largely work on the first try: sport mode, snow mode, all-purpose mode, ride height adjustments, and targeted seat heating all respond cleanly. Navigation to Miami surfaced a quirk where the assistant found a slow Level 2 charger located well beyond the vehicle's current range, which the reviewer resolved by asking for turn-by-turn navigation separately and letting the built-in trip planner handle charge routing. Some limitations are deliberate: charge limit cannot be adjusted by voice, and active safety features like lane keeping assist are locked out for safety reasons. SMS messaging works through iMessage but not RCS, group texts are not yet supported, and voice punctuation is not recognized. Windshield wipers also fall outside the current command set despite many other vehicle systems being accessible. The assistant does not run locally and response speed depends on cellular connectivity.
Bottom line: Rivian Assistant is the most useful in-car AI in any production EV right now. The edge cases are real, but the core commands work, the messaging works, and the roadmap is clearly active. If you already pay for Connect Plus, try it immediately. If $15 a month for a voice layer on top of a $70,000 truck feels like the wrong direction, that is a fair reaction too.