Run: 2026-04-24-01KPZV2VFJ9HQF0W95AR38NA1F

Run Details

Model:: Claude Opus 4.7
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 5.3s
Cost:: $0.008250
Provider:: Amazon Bedrock

Evaluation summary

Score	Evaluator	Details Link
98.15%	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 fell steadily against the tall windows of Ashford Manor. Inside, twelve guests gathered for Lord Pemberton's annual winter gala. The grandfather clock in the foyer chimed exactly nine times. Margaret Hensley adjusted her pearls and sipped her red wine. Across the room, Detective Blackwood watched everyone with quiet interest. He had not been invited here for pleasant dinner conversation. Lord Pemberton had written him a letter three days prior. The old man feared someone inside wanted him dead tonight. Suddenly, the lights flickered once, then plunged everyone into darkness. A woman screamed somewhere near the marble staircase by the library. When the chandelier blazed back to life, Pemberton lay motionless. A silver letter opener protruded from his crisp white shirt. Detective Blackwood rose slowly, scanning each stunned face around him. Someone in this very room had just committed cold murder.

Evaluation details

Result

Evaluator

Details

Meta Data

98.15%

Matches word count

n/a

neededClean

false

sentences

wordCounts

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