Run: 2026-07-25-01KYCPSJQEESF3DM53WVAGDA1Z

Run Details

Model:: Claude Opus 5
Test:: N-Length Sentences
Scenario:: Write sentences with 5 words each
Duration:: 6.6s
Cost:: $0.006225
Provider:: Amazon Bedrock

Evaluation summary

Score	Evaluator	Details Link
82.10%	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 drummed against the windows. Detective Mara Voss stepped inside. The parlor smelled of copper. Lord Ashcombe lay face-down. His fingers clutched a locket. Blood pooled beneath the piano. Someone had wound the metronome. It ticked in the silence. Mara counted the seven guests. Each one avoided her eyes. The butler cleared his throat. "Nobody left this room, ma'am." Mara knelt beside the body. The locket held no photograph. Instead, a folded paper waited. Three words: "She knows everything." Thunder cracked above the manor. Every light died at once. Someone screamed in the darkness. When the candles returned, Mara counted six guests remaining.

Evaluation details

Result

Evaluator

Details

Meta Data

82.10%

Matches word count

n/a

neededClean

false

sentences

wordCounts

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