Musk told the G20 that AI and robots will add trillions to the world economy, a bullish pitch for Tesla investors that comes with a heavy dose of over-optimistic timing.

• Musk said AI will lift the global economy 20–30% a year, and humanoid robots could eventually multiply it tenfold.
• He predicted that within 12 to 18 months AI will write software better than any human can.
• He also called for lighter regulation, saying new technology should be legal by default and governments should back startups instead of big incumbents.
• Musk expects a billion humanoid robots within 10 years — a timeline that looks two to three times too fast, with the real robot boom closer to the late 2030s.
• The bigger near-term problem is electricity: chip production is growing far faster than power supply, and a shortfall is expected next year outside China.

Outlook: Expect the power crunch, not the technology, to be the main brake on AI growth over the next year, with China's cheap manufacturing and electricity leaving it best placed to win the robot race.