
The $100 Model Isn't the Hard Part. The Answer Key Is.
ArticleA 4-minute read for founders: Coinbase says its 9B fraud model cost under $100 to train, so the real question is whether you own the confirmed answers it learned from.

A 4-minute read for founders: Coinbase says its 9B fraud model cost under $100 to train, so the real question is whether you own the confirmed answers it learned from.

A 4-minute read for builders: a free CPU baseline scored 91.0% on 3,080 public bank tickets in my test, plus the cost formula and labelling bill to check.

A 4-minute read for platform leads: the router, eval gate, drift monitor and rollback a fine-tuned small model needs before its benchmark win becomes production.

A 4-minute read for founders: in a peer-reviewed study of 5,172 support agents, AI lifted the least experienced most, so here is a 90-day rollout plan built for that.

A 4-minute read for engineering leaders: a scored delivery check, built on DORA's 2025 industry survey report of 4,867 respondents, that shows whether AI gains will hold.

A 4-minute read for builders: a harness that times AI vs no-AI work on a greenfield task and a mature-repo fix, plus my 2-run demo that settles nothing yet.

A 4-minute read for founders: the stop check that caught 3 of 3 seeded retry loops at step one in Rex Circuit's 50-ticket test, and how to ship it by Monday.

A 4-minute read for engineering leads: why a passing run can still ship a wrong answer, and the check that caught all 3 cases in our small local test.

A 4-minute read for builders: two decision gates worth copying this week, one that isn't, and the one command that reproduces my small local CPU test.

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