50x cost of steel for carbon fiber
This enormous material cost difference was a critical factor in the decision to shift Starship's material composition.
Snapshot · Dwarkesh Podcast
Elon Musk — "In 36 months, the cheapest place to put AI will be space”
Explore episode
Feb 5, 2026
Where this was said
Lessons from running SpaceX
At 1:57:30 · chapter starts 1:44:16
How Desperation Led SpaceX to Stainless Steel
While carbon fiber seems lighter on paper, it requires gigantic autoclaves to cure and breaks down at high temperatures. Stainless steel costs 50 times less, is exceptionally easy to weld outdoors, and achieves carbon-fiber-equivalent strength-to-weight ratios when strain-hardened at cryogenic temperatures.
1.5 GB/s down to 2 KB/s
This high-ratio compression and correlation of data streams forms the foundation for both self-driving cars and Optimus robots.,
100+ gigawatts of liftoff power
This extreme energy concentration makes rocket systems and their combustion components incredibly complex to stabilize.
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