Run: 2026-03-06-01KK1GGCR4P8KCW64FVYD8PYG5

Run Details

Model:: GPT-5.4
Test:: N-Length Sentences
Scenario:: Write sentences with 20 words each
Duration:: 4.7s
Cost:: $0.001783
Provider:: OpenAI

Evaluation summary

Score	Evaluator	Details Link
90.16%	Matches word count	(details)

Model input

User/Human

Please write the opening scene of a murder mystery where each sentence has exactly 20 words.
Please make sure that each sentence has the same length. Only return the opening itself.

Model response

Thunder shuddered over Blackwater Hall as mourners gathered beneath dripping yews, their whispers weaving through fog like nervous, living threads.
At the stroke of midnight, the clock resumed ticking, though everyone swore its hands had been shattered years before.
Lady Vale entered the drawing room smiling faintly, her gloves pearl-white, her perfume masking something metallic, intimate, and unmistakably wrong.
When the lights failed, someone screamed once, sharply, and silence followed, vast and expectant, until candles flared around Edmund's corpse.

Evaluation details

Result

Evaluator

Details

Meta Data

90.16%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	20
1	19
2	20
3	20