Run: 2026-09-29-01M3P2C551TMMQQPX0NYAE57T3

Run Details

Model:: Claude Sonnet 5.5 (Reasoning)
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 15.1s
Cost:: $0.019424
Provider:: Claude Platform on AWS

Evaluation summary

Score	Evaluator	Details Link
88.89%	Matches word count	(details)

Model input

User/Human

Please write the opening scene of a murder mystery where each sentence has exactly 10 words.
Please make sure that each sentence has the same length. Only return the opening itself.

Model response

Rain hammered the windows of Blackwood Manor that November night. Inspector Hale arrived just after midnight, soaked and deeply annoyed. A constable led him through the foyer toward the library. Lord Ashcombe lay sprawled across the Persian rug, eyes open. A silver letter opener protruded from his chest, gleaming wetly. "Nobody touched anything," the constable whispered, "except the doctor, briefly." Hale knelt and noticed the clock had stopped at eleven. Yet the grandfather clock in the hallway still chimed twelve. Someone here was lying about the time, Hale thought quietly. Seven suspects waited in the drawing room, every one trembling.

Evaluation details

Result

Evaluator

Details

Meta Data

88.89%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	10
1	10
2	10
3	10
4	10
5	20
6	10
7	10
8	10