The Kaer Labs blog

Written up, worked out

Findings with their methods attached, engineering post-mortems with the bills included, and the occasional argument. Everything here was measured before it was written.

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Findings · 24 Jun 2026 · R-07

Twelve ways to ask the same question

We rephrased 40 questions twelve ways each, ran them across 312 models at temperature zero, and found wording moved accuracy more than changing model did.

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Three harnesses later: everything our eval infrastructure got wrong

Two rewrites, a six-week contamination we shipped without noticing, and the dull append-only architecture that finally held: a post-mortem for anyone wiring up evaluation infrastructure now.

Engineering · 5 min09 Jun 2026
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Alignment is a verb

A model is certified once, then quietly reshaped by a dozen uncoordinated hands, which is why alignment is not a certificate you earn but maintenance you budget for.

Essays · 6 min07 Jun 2026
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Eight months of asking one assistant the same 1,850 questions

For eight months we put the same 1,850 questions to one public-service assistant; competence barely moved, but its manner drifted and it changed nine times, six unannounced.

Findings · 5 min18 May 2026
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Cheap intelligence changes who gets to ask

A welfare-navigation pilot let us watch the price of a competent answer fall to three tenths of a penny, and log who began asking once asking cost nothing.

Essays · 6 min12 May 2026
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The £40 behavioural read

A worked, honest recipe for a decision-grade read on a model's behaviour for about forty pounds: the sampling, the local judges, the batch pricing, and what it cannot see.

Methods · 5 min02 May 2026
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The Ordinary Tuesday protocol

Most benchmarks test the questions a model can be graded on; we built one for the messages people actually send, and scored what happens when it gets them wrong.

Methods · 6 min29 Apr 2026
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Refusals have a grammar

Refusal rates get benchmarked everywhere and refusal styles almost nowhere, so we hand-coded 9,400 declines into six shapes and found the most dangerous one invisible to the user.

Findings · 5 min14 Apr 2026
The digest

One finding a fortnight, by email

No roundups, no "in this issue". One measured thing, explained properly, every other Tuesday.