Physix FrontierPhysix Frontier · News Briefing Card (IT Home · Oct 2, 2026)
Musk Cuts AI5/AI6 Memory to Protect Optimus Production
KEY FACTS
- On October 2, Musk announced on X that Tesla is cutting memory usage for its AI5 and AI6 chips.
- AI5 memory drops from 144GB to 72GB LP5, a 50% reduction.
- AI6 memory drops from 216GB to 144GB LP6, a reduction of about 33%.
- Musk said memory bandwidth is the real bottleneck, and since bandwidth is unchanged, the impact is negligible.
- The adjustment aims to reallocate memory to meet Optimus robot mass-production demand.
KEY DATA
144GB→72GB LP5AI5 memory
216GB→144GB LP6AI6 memory
over 200GBDRAM demand per humanoid robot
about 45 billion GBGlobal annual DRAM output
PHYSIX OBSERVATION
Musk voluntarily cutting chip memory to protect robot mass production shows memory supply is already tight enough to sacrifice vehicle-side compute configuration. Micron predicts over 200GB of DRAM per robot; if that truly scales to tens of billions of units, the memory industry will be reshaped by robots. But with bandwidth unchanged and capacity halved, whether inference performance is truly unaffected still needs real-world testing to verify.
Source: IT Home report