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site iconTomasz TunguzModify

I’m a venture capitalist since 2008. I was a PM on the Ads team at Google and worked at Appian before.
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Spending Like a Hyperscaler

2026-08-05 08:00:00

SpaceXAI reported $18.37b of capex in its first public quarter, $15.83b of it AI infrastructure, against a $13.2b consensus. Amazon spent $53.1b in the same quarter, Alphabet $44.9b, Microsoft $41.0b & Meta $31.1b, & sequential dollar additions were comparable across all five. The difference is funding : operating cash flow covers 155% of capex at Microsoft & 106% at Meta but only 12% at SpaceXAI, with Oracle at 89%, Alphabet 87%, Amazon 84% & CoreWeave 39%. Both markets have repriced it, with SPCX closing at $108 against a $135 IPO price & every tranche of the $25b June bond trading below par.

Racing to Sustain Jevons' Paradox

2026-08-04 08:00:00

Hyperscalers declared AI capacity-constrained on Q2 2026 calls. HBM3e memory rose 20% & HBM4 is forecast to double, while B200 spot rentals have held flat. Model makers are segmenting into premium, mid-market, & value tiers to keep Jevons' paradox alive through the coming shock.

AI is a Terrible Ghostwriter

2026-08-03 08:00:00

In the age of slop, readers test authenticity. I lace posts with subliminal sincerity — the ampersand, neologisms, grammatical plumes, mimicry. Then AI edits it all. I've never had a ghost writer, but I did have a human editor. Was that any different?

AWS's Road to a Trillion

2026-07-30 08:00:00

AWS grew 36.7% in Q2 2026 to $42.2b, its fastest in 18 quarters, narrowing Azure's lead from 16 points to 6. Jassy said AWS has the potential to become a $1 trillion annual revenue business, against a current $169b annualized run rate. Amazon raised 2026 capex to $220b and trailing free cash flow fell to negative $7.6b.

Microsoft Resells the Frontier

2026-07-29 08:00:00

Google owns its models & chips & spends aggressively on the margin that ownership captures, while Microsoft resells both layers & hedges with capacity it can stop buying.

Aftermarket Harnesses

2026-07-28 08:00:00

The harness now moves the coding benchmark more than the model does. Endor Labs' Agent Security League found GPT-5.5 scored 61.5% functional correctness in Codex & 87.2% in Cursor, & Claude Opus 4.7 scored 87.2% in Claude Code & 91.1% in Cursor. Input tokens are 86-98% of OpenRouter volume, so the harness controls most of the bill through cache discipline. First-party co-design buys real cache hit rates, but a third-party harness can match them.