NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2025-05-22-01JVWP544BX3HEM284PPG1W109
Run Details
Model:
Claude Opus 4
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
12.5s
Cost:
$0.012060
Evaluation summary
Score
Evaluator
Details Link
52.80%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The grandfather clock struck midnight as Detective Sarah Chen entered the Victorian mansion through its grand oak front door. Rain pelted against tall windows while lightning illuminated the study where Marcus Blackwood lay dead on Persian carpet. Blood pooled beneath his silver hair, staining antique fibers as the storm outside matched the violence witnessed inside tonight. Three family members huddled in the parlor, each claiming innocence while casting suspicious glances at one another quite nervously. The murder weapon, a bronze letter opener, rested beside the body, its ornate handle glinting under crystal chandelier light. Sarah pulled latex gloves from her coat pocket, knowing this case would test every skill she had ever learned.
total_cost
0.01206
Evaluation details
Result
Evaluator
Details
Meta Data
52.80%
Matches word count
n/a
neededClean
false
sentences
6
wordCounts
0
19
1
18
2
19
3
19
4
19
5
19