SemiAnalysis: robot brains are capped by on-device latency and unit economics, not frontier models
bodonoghue85 · x · 2026-09-15
SemiAnalysis's deep dive "A Brain Too Big to Carry" examines where a robot's brain should live. Two hard constraints invert the LLM playbook: real-time control loops mean slow actions become obsolete, and manufacturers must prepay compute for every unit — billions, potentially trillions at billion-robot scale. So on-robot hardware is fixed first and models are designed to fit, capping frontier intelligence against latency and unit economics. The piece covers Jetson Thor vs B300 TCO, silicon & DRAM efficiency, robot model sizes, deployments, and the network wall.
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