Run: 2025-05-22-01JVWT0G61Z5GGP1SA7YVKHVQ2

Run Details

Model:: Claude Opus 4
Test:: N-Length Sentences
Scenario:: Write sentences with 5 words each
Duration:: 8.3s
Cost:: $0.011760

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 5 words.
Please make sure that each sentence has the same length. Only return the opening itself.

Model response

The mansion stood completely silent. Rain hammered against dark windows. Lady Catherine entered the library. Her scream pierced the air.

Lord Pemberton lay sprawled dead. Blood pooled beneath his body. The letter opener protruded upward. His face showed pure terror.

She backed away very slowly. The door slammed behind her. Someone else was definitely here. Heavy footsteps approached the door.

"Nobody leaves," shouted Inspector Hayes. He had arrived too quickly. Catherine wondered who called him. The servants huddled together fearfully.

The grandfather clock struck midnight. Everyone had clear, perfect alibis. Yet the body proved otherwise. This murder seemed simply impossible.

Evaluation details

Result

Evaluator

Details

Meta Data

100.00%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	5
1	5
2	5
3	5
4	5
5	5
6	5
7	5
8	5
9	5
10	5
11	5
12	5
13	5
14	5
15	5
16	5
17	5
18	5
19	5