Run: 2026-06-01-01KT1G0EKHQC2TS4HY7RX92SVT

Run Details

Model:: Claude Opus 4.8 (Reasoning, Low)
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 37.1s
Cost:: $0.037275
Provider:: Anthropic

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 cold rain fell hard against the mansion's tall windows.
Detective Sarah Cole arrived just before the clock struck midnight.
The lifeless body lay sprawled across the cold marble floor.
Dark blood pooled slowly beneath the victim's twisted right hand.
Sarah knelt down slowly, studying every detail of the scene.
Someone had truly wanted this wealthy old man dead tonight.
The frightened guests upstairs knew nothing of the horror below.
Sarah took a deep breath and began her difficult investigation.

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