Run: 2026-09-29-01M3P2A4RXSD7GFCBB756W36MX

Run Details

Model:: Claude Sonnet 5.5 (Reasoning)
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 15.4s
Cost:: $0.020664
Provider:: Claude Platform on AWS

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

Rain hammered Blackwood Manor's windows the night Lord Ashby died. Inspector Clara Voss arrived near midnight, her coat soaked through. The butler waited in the foyer, pale and visibly trembling. Lord Ashby lay sprawled across the study floor, eyes open. A silver letter opener jutted from his chest, still gleaming. Clara knelt beside him and noticed the window was locked. Nobody could have entered, and nobody could have escaped, either. Behind her, the grandfather clock chimed twelve, then stopped ticking. Clara faced the butler and asked who else was home. Five guests, he whispered, and each of them hated him.

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