Lech Mazur Writing Leaderboard

Lech Mazur Writing (LLM Creative Story-Writing Benchmark): LLM Creative Story-Writing Benchmark: models write short stories that must organically incorporate 10 randomly-assigned required elements within a target word range, and other LLMs judge the outputs. The current canonical method (2026) is pairwise head-to-head comparison (relative Thurstone score); the widely-cited earlier method was a 0-10 LLM-grader rubric panel.

GPT-5 leads Lech Mazur Writing at 86. The full leaderboard above lists every recorded measurement, not just the headline number.

41 models have recorded scores on Lech Mazur Writing, spanning a score spread of 25.5.

tensor.news grades Lech Mazur Writing B for integrity (score 76/100), ranking #45 of 61 benchmarks we assess across discrimination, saturation, contamination resistance, harness comparability, and freshness.

No — Lech Mazur Writing still has headroom and continues to discriminate between models rather than bunching them at the ceiling.

Its test set is public, so contamination risk is on the table: a high score may partly reflect training-data overlap rather than capability.

Scores are reported under a consistent harness, so comparisons on Lech Mazur Writing are reasonably apples-to-apples.

Every Lech Mazur Writing measurement is source-backed and tagged reproduced, self-reported, or unverified; the underlying record cites github.com/lechmazur/writing.