Run: 2026-06-01-01KT1GJWXNZRMXA1FSSYQ8FY90

Run Details

Model:: Claude Opus 4.8 (Reasoning, Low)
Test:: N-Length Sentences
Scenario:: Write sentences with 5 words each
Duration:: 18.5s
Cost:: $0.006725
Provider:: Amazon Bedrock

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

Rain hammered the old mansion. Detective Cole arrived past midnight. The front door stood open. Nobody answered his repeated calls. He stepped inside the foyer. A single lamp flickered weakly. Shadows danced across the walls. Then he smelled the blood. His hand reached his holster. The staircase creaked above him. Someone was still here, watching. Cole climbed the steps slowly. Each board groaned underfoot loudly. A body lay ahead, motionless. The wealthy widow was dead. Her eyes stared at nothing. Crimson pooled beneath her head. A letter rested nearby, crumpled. Cole knelt to read it. The words changed everything instantly.

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