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MCS · Rigs · Compare

Side-by-side, with the numbers that matter.

Two rigs, one table. Higher numbers win in cobalt; TDP and price flip.

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SpecCerebras Wafer-Scale Engine 3Tesla Optimus
AI Stack—Tesla FSD-derived end-to-end neural networks (vision-only)
Battery KWH—2.3
Cores900,000—
CS4 Introduced2026-08-18—
CS4 Wse3 Turbo Count3—
DIE Size MM246,225—
Fabric Bandwidth Pbit S214—
Fremont Line Capacity Robots PER Year—1,000,000
Fremont Status Q2 2026—S/X lines decommissioned; Optimus lines being installed
Gen2 Announcement Date—2023-12-13
Gen2 Hand DOF—11
Gen2 Height CM—173
Gen2 Neck DOF—2
Gen2 Total DOF Unverified—28
Gen2 Walking Speed Boost PCT—30
Gen2 Weight KG—57
Gen2 Weight Reduction KG—10
Gen3 Announcement Quarter—Q1 2026
Gen3 Forearm Actuators—25
Gen3 Hand DOF—22
Gen3 Payload KG—20
Gen3 Production Target Superseded—summer 2026
Gen3 Total Actuators PER Robot—50
Gen3 Unveil Status—not unveiled as of 2026-09-23 (Tesla North)
Memory Bandwidth PB S21—
ON Chip Sram GB44—
Payload PER Hand KG—9
Peak AI Petaflops125—
Process NodeTSMC 5nm—
Public Sale Target—end of 2027 (Musk at Davos, 2026-01-22)
Runtime Hours Light Duty—8
Status Checked—2026-09-24
Transistors Trillion4—
Walking Speed KM H—8
Wse3 Turbo Peak AI Petaflops250—