2 docs tagged with "benchmarks"

The hardest part of working with language models isn't building one — it's knowing, with any confidence, whether the new version is actually better. There's no single number that captures "good," and the real skill in evaluation is knowing each imperfect proxy's specific blind spot well enough to know when it's lying to you.

fmt is fast for structural reasons, not micro-optimizations — knowing which ones lets you tell when