Run: 2026-06-01-01KT1HDTB714XHA18R1S049986

Run Details

Model:: Claude Opus 4.8 (Reasoning, Low)
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 41.0s
Cost:: $0.034475
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 rain hammered against the old mansion's tall glass windows.
Detective Sarah Cole arrived just after the clock struck midnight.
A body lay sprawled across the cold marble entrance floor.
Blood pooled slowly beneath the victim's expensive silk evening gown.
The guests huddled together, their faces pale with raw fear.
Nobody had heard the gunshot during the violent thunder storm.
Sarah knelt down, examining the wound with practiced careful eyes.
Someone in this room had murdered the wealthy old man.
The front doors were locked from the inside all night.
She stood up and slowly turned to face the suspects.
One among you will not leave this house tonight free.

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
10	10