Run: 2025-05-22-01JVWK8Y55N2BV2KN7YSFEZ5AG

Run Details

Model:: Claude Opus 4
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 15.6s
Cost:: $0.011310

Evaluation summary

Score	Evaluator	Details Link
100.00%	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

The grandfather clock struck midnight in Lady Pemberton's drawing room. Detective Sarah Mills arrived precisely as the screaming had started. She found the butler standing over the victim's lifeless body. Blood pooled beneath the crystal chandelier on Persian rug patterns. "Nobody must leave this mansion tonight," Sarah commanded them all. The seven dinner guests huddled together near the marble fireplace. Lady Pemberton clutched her pearl necklace with trembling pale hands. "Lord Pemberton is dead," the butler whispered through thin lips. Sarah noticed the study door was slightly ajar and suspicious. A letter opener protruded from between his shoulder blades deeply.

Evaluation details

Result

Evaluator

Details

Meta Data

100.00%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	10
1	10
2	10
3	10
4	10
5	10
6	10
7	10
8	10
9	10