Run: 2026-05-31-01KSYX8106GWZ8275DS7P0XS31

Run Details

Model:: Claude Opus 4.8 (Reasoning, High)
Test:: N-Length Sentences
Scenario:: Write sentences with 5 words each
Duration:: 11.4s
Cost:: $0.019600
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 5 words.
Please make sure that each sentence has the same length. Only return the opening itself.

Model response

The rain fell that night. Detective Mara entered the room. A body lay quite still. Blood stained the white carpet. The mansion felt eerily quiet. Mara studied the cold scene. Someone here was a killer. The victim wore expensive jewelry. Nothing seemed to be missing. A knife rested nearby silently. Footsteps echoed down the hall. Mara turned toward the sound. The night had just begun.

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