Run: 2026-04-24-01KPZTTT39T036YP8RKWRW6WSJ

Run Details

Model:: Claude Opus 4.7
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 5.5s
Cost:: $0.008600
Provider:: Amazon Bedrock

Evaluation summary

Score	Evaluator	Details Link
94.82%	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

Rain hammered against the tall windows of Blackwood Manor tonight. Detective Sarah Chen stepped carefully across the polished marble floor. A single candle flickered beside the body sprawled below. The victim wore an elegant gown stained crimson near her chest. Six guests stood frozen in the grand dining room nearby. Lightning illuminated their pale faces through the rain-streaked glass panes. Nobody spoke a word as Sarah knelt beside the corpse. The woman clutched a torn photograph tightly in her stiffened fingers. Sarah gently pried the damaged image from her cold grip. Half a face stared back, the other half brutally removed. Someone in this very room knew exactly who was missing. The old grandfather clock struck midnight with twelve solemn chimes. Sarah rose slowly and turned to face the trembling witnesses. "Nobody leaves this house," she announced in a quiet voice. Outside, the storm raged harder against the ancient stone walls.

Evaluation details

Result

Evaluator

Details

Meta Data

94.82%

Matches word count

n/a

neededClean

false

sentences

wordCounts

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