From AI to SI: What Elon Musk’s New Company Naming Strategy Really Means

When Elon Musk mentions using "SI" in company names or project titles, he is almost certainly referring to one of two main concepts (with the first being the most likely based on his engineering background):
 

1. *SI = International System of Units (Système International) (Most Likely)*

In science and engineering, SI stands for the Système International d'Unités (the modern metric system). It uses standardized prefixes to denote scale in multiples of 1,000, such as:

• Kilo- (10³ / thousand)
• Mega- (10⁶ / million)
• Giga- (10⁹ / billion)
• Tera- (10¹² / trillion)
• Peta- (10¹⁵)
• Exa- (10¹⁸)
• Zetta- (10²¹)
• Yotta- (10²⁴)

What this means in practice:

Elon Musk is obsessed with physics-first thinking and massive scale. He already uses SI prefixes heavily in his businesses:

• Tesla: Gigafactory (and later mentioning Terafactory scale for battery production).
• xAI / Supercomputing: Measuring computing clusters in Exaflops or naming project tiers after metric scale (e.g., Peta, Exa, Zetta).

If he starts explicitly using SI prefixes in company or product names, it means naming entities directly after their order of magnitude or scientific scale to signify extreme capability, size, or speed.
 

2. SI = Synthetic Intelligence (or Super Intelligence) (AI Context)

In the context of artificial intelligence (especially with his company xAI):

• Synthetic Intelligence (SI): Some computer scientists prefer "Synthetic Intelligence" over "Artificial Intelligence." Artificial can imply fake or imitation intelligence, whereas Synthetic implies real intelligence that has been artificially constructed (like synthetic diamond vs. real diamond).
• Super Intelligence (ASI / SI): Referring to AI that far surpasses human cognitive abilities.

What this means in practice:

If Musk uses "SI" in this context, it signals a shift away from traditional "AI" branding toward building true, high-level intelligence or Artificial Superintelligence.
 

Summary of Musk's Naming Style

Elon Musk frequently uses naming schemes inspired by sci-fi, physics, and tongue-in-check humor:

• Tesla Models: S, 3, X, Y (spells "SEXY").
• SpaceX: Droneships named after Iain M. Banks sci-fi novels (Just Read the Instructions, Of Course I Still Love You).
• The Boring Company: A play on words for tunneling vs. tediousness.

By adopting SI (Metric Prefixes / Scientific Units), he is reinforcing his brand identity around hard engineering, massive scientific scale, and physics-based naming.