Run: 2026-05-31-01KSYXDATGMVE89VG53S7YAK8X

Run Details

Model:: Claude Opus 4.8 (Reasoning, High)
Test:: N-Length Sentences
Scenario:: Write sentences with 5 words each
Duration:: 7.1s
Cost:: $0.005600
Provider:: Anthropic

Evaluation summary

Score	Evaluator	Details Link
97.05%	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

Rain hammered the old mansion. Detective Cole stepped through doors. The body lay face-down. Blood pooled across marble floors. A knife glinted near him. Servants whispered in the hallway. Nobody dared approach the corpse. Cole knelt beside the victim. The man wore expensive clothes. His pocket held a note. "They know what happened," it read. Cole frowned at those words. Thunder cracked outside the windows. Someone here was the killer. The night had just begun.

Evaluation details

Result

Evaluator

Details

Meta Data

97.05%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	5
1	5
2	4
3	5
4	5
5	5
6	5
7	5
8	5
9	5
10	6
11	5
12	5
13	5
14	5