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Monthly brief

The month: Sep 2026

The builder's brief for the month: what changed, what it costs to build now, where the openings are.

What changed

4 picks. Leading: Reading List 09/19/2026; Reading List 2026-09-26.

Infrastructure4

InfrastructureSep 19, 2026 · 8:03 AM ET · Construction Physics (Brian Potter)

AirBnB’s housing accelerator, rising steel prices, a resurgence of US coal power, low-head dams, and more.

Builder score 92Why it scoresRules judge pick: Infrastructure item; Topics: chips, energy, policy; Source: Construction Physics (Brian Potter).
InfrastructureSep 26, 2026 · 6:17 AM ET · Construction Physics (Brian Potter)

ASML’s lack of European sales, a California distributed power plant, Starlink as a planetary barometer, and more.

Builder score 75Why it scoresRules judge pick: Infrastructure item; Topics: energy, policy; Source: Construction Physics (Brian Potter).

What it costs to build now

Live build costs from public sources. Full tables on the stack page.

  • AI API prices

    441 models priced per 1M tokens.

    Source: OpenRouter, fetched 2026-10-25

  • GPU rental

    33 GPU models priced per GPU-hour.

    Source: Vast.ai, fetched 2026-10-25

  • Cost of money

    Bank Prime Loan Rate: 7.00% on Oct 21, 2026.

    Source: FRED, Federal Reserve Bank of St. Louis (DPRIME)

See the full stack

Where the openings are

Ownership and build openings: Reading List 09/19/2026; Reading List 2026-09-26; ClusterMAX 3.0: The Industry Standard GPU Cloud Rating System Returns.

InfrastructureSep 19, 2026 · 8:03 AM ET · Construction Physics (Brian Potter)

AirBnB’s housing accelerator, rising steel prices, a resurgence of US coal power, low-head dams, and more.

Builder score 92
InfrastructureSep 26, 2026 · 6:17 AM ET · Construction Physics (Brian Potter)

ASML’s lack of European sales, a California distributed power plant, Starlink as a planetary barometer, and more.

Builder score 75