Research

Open notes on text + task difficulty modeling

Current Model: Score Engine v1

Published: 2026-03-17 | Authors: CEFR.AI | Method Note

This note documents the current production scoring model as implemented in the score engine API (`meta.version = legacy-gse-v1`). The goal is methodological transparency: what v1 does well, what it does not do, and what evidence currently supports it. v1 estimates text difficulty from text-only inputs. It combines: - Flesch Reading...