Rivian unveils custom AI chip and autonomous driving tech with lidar, hinting at robotaxi future

Reviewed byNidhi Govil

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Rivian showcased its ambitious autonomous driving roadmap at its first Autonomy & AI Day, revealing a custom-built RAP1 processor, lidar integration, and a sophisticated AI assistant. The EV maker plans to expand hands-free driving to 3.5 million miles of roads and aims for Level 4 autonomy, with CEO RJ Scaringe hinting at potential entry into the ride-hail market to compete with Waymo.

Rivian Unveils Custom Silicon and Self-Driving Platform

Rivian detailed its autonomous driving ambitions at its inaugural Autonomy & AI Day event in Palo Alto, California, revealing hardware and software advancements that position the EV maker as a serious competitor to Tesla and other automakers. The centerpiece of this announcement is the Rivian Autonomy Processor (RAP1), an in-house AI chip built on a 5nm process using Armv9 architecture with 14 Cortex-A720AE cores

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. This custom silicon powers the third-generation autonomy computer, ACM3, which delivers 1,800 TOPS of INT8 inference and can process 5 billion pixels per second—representing 2.5 times better energy efficiency and four times the performance of the current Gen 2 system

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Source: Bloomberg

Source: Bloomberg

The ACM3 will debut in late 2026 versions of the upcoming R2 EVs, paired with lidar sensors integrated into the roofline above the windshield. This marks a strategic departure from Tesla's camera-only approach, with Rivian emphasizing that lidar provides "three-dimensional spatial data and redundant sensing" for real-time detection of edge cases

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. The R2 platform will feature 11 cameras totaling 65 megapixels and five redesigned radar units, with improved short-range capability allowing Rivian to eliminate ultrasonic parking sensors entirely

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Source: Electrek

Source: Electrek

Large Driving Model Powers Autonomous Capabilities

Rivian is building what it calls a Large Driving Model, an AI system trained on real-world driving scenarios that represents a shift away from rules-based frameworks for developing autonomous vehicles

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. The company claims this approach uses Group Relative Policy Optimization, similar to techniques employed by DeepSeek, and applies the same neural network and training patterns familiar from large language models used in AI chatbots

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Source: Tom's Hardware

Source: Tom's Hardware

This technology will enable Universal Hands-Free driving, launching in early 2026 for second-generation R1 trucks and SUVs. The feature will cover 3.5 million miles of roads across the USA and Canada, extending beyond highways to surface streets with clear lane markings

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. Rivian will charge a one-time fee of $2,500 or $49.99 per month for this Autonomy+ service

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Path to Level 4 Autonomy and Robotaxi Ambitions

CEO RJ Scaringe outlined an ambitious roadmap that progresses from point-to-point navigation to eyes-off driving, ultimately reaching what Rivian calls "personal L4"—referring to Level 4 autonomy where vehicles can operate independently under defined conditions

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. "What that means is you can get into the vehicle at your house, plug in the address to where you're going, and the vehicle will completely drive you there," Scaringe explained, describing future capabilities where drivers can reclaim their time by reading or using their phones

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Scaringe also hinted at potential competition with Waymo in the ride-hail market. "While our initial focus will be on personally owned vehicles, which today represent a vast majority of the miles driven the United States, this also enables us to pursue opportunities in the rideshare space," he stated

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. This signals Rivian's interest in the robotaxi market, though the company emphasizes that personally owned vehicles remain the priority.

Rivian AI Assistant Offers CarPlay Alternative

Rivian has spent nearly two years developing its Rivian AI assistant, a sophisticated voice interface that integrates deeply with vehicle controls and third-party services

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. The assistant launches in early 2026 on all Rivian vehicles, including first- and second-generation R1T and R1S models, with native integration on the R2 by late 2026

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The voice assistant addresses a major pain point for customers who miss Apple CarPlay and Android Auto functionality. During a live demonstration, the system read and responded to text messages, accessed Google Calendar to reschedule meetings, found nearby restaurants, and sent updated ETAs to contacts—all through natural, conversational commands

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. The assistant can also control vehicle functions like switching drive modes or activating seat warmers, going beyond what CarPlay or Android Auto can accomplish

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Wassym Bensaid, Rivian's chief software officer, explained that the company built an architecture that is model and platform agnostic, using what the industry calls an "agentic framework" to interface with different AI models

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. The system combines edge AI for on-device tasks with cloud AI for more compute-intensive operations, creating a flexible hybrid software stack

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. Rivian also plans to use the assistant for predictive maintenance by embedding AI into diagnostics to help technicians pinpoint complex issues

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Strategic Implications and Industry Competition

These announcements represent a public signal to shareholders that Rivian is keeping pace with or exceeding the automated-driving capabilities of rivals like Tesla, Ford, General Motors, and automakers from Europe and China

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. The timing is significant as Rivian pushes to begin production of its more affordable R2 SUV in the first half of 2026, with initial models shipping without the ACM3 or lidar sensor before the upgraded versions arrive later that year

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The AI assistant and autonomous driving development remain separate from Rivian's $5.8 billion joint venture with Volkswagen, which focuses on electrical architecture, zonal compute, and infotainment systems

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. However, Bensaid noted that this separation "doesn't mean that it may not be in the future," suggesting potential expansion of the partnership

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. With Rivian's software and services business already turning a profit unlike its automotive division, the company may look to sell its autonomous driving and assistant technology to other automakers

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