Perplexity and Calibration
If your model says 90 percent confident on a thousand answers and gets six hundred right, it is not well calibrated. Calibration is half of trustworthy eval. The other half is perplexity, which tells you whether the model thinks the held-out text is plausible at all.
Visual edition planned
This lesson isn’t interactive yet.
It is part of the curriculum and will get the same treatment as Phase 1 — a visual cover, hands-on labs, derivations with numeric checks and a quiz. Until then, the original lesson is the best place to read it:
Part of Phase 19 — Capstone Projects. Use the previous / next cards below to keep browsing the phase.