Model

Claude 3.7 Sonnet

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-02-24-01JMWZZJPSMXJSPRNFDMK5XE45

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

AI
# The Vanishing Hour Detective Morgan surveyed the crime scene, her trained eyes picking up subtle clues others might easily have overlooked. A grandfather clock stood silently in the corner, its hands frozen at precisely three minutes past midnight. The victim lay sprawled across an antique Persian rug, one arm extended as if reaching for something just beyond grasp. Blood had congealed around the silver letter opener embedded in his chest, forming a dark medallion on his silk pajamas. Raindrops tapped gently against tall windows overlooking the garden where someone had recently trampled through carefully cultivated rose bushes. The house remained eerily quiet except for the occasional creak of floorboards beneath the weight of forensic technicians. "He was expecting his killer," Morgan murmured, noting the two crystal glasses of whiskey sitting untouched on the mahogany desk. Nothing appeared stolen, yet drawers hung open haphazardly, their contents strewn about as if someone had been searching frantically. The victim's secretary discovered the body early this morning when he failed to appear for an important business meeting. Detective Morgan knelt beside the corpse, wondering what secrets this powerful man had taken with him to the grave.
id"gen-1740434820-tVOvqXjPLj9VE9FQHnZx" 
upstream_id"msg_01UKrtu96aCCoX76qtbaKZin" 
total_cost0.004242
cache_discount(null)
provider_name"Anthropic" 
created_at"2025-02-24T22:07:06.260459+00:00" Monday, February 24th, 2025 at 10:07:06 PM GMT+00:00
model"anthropic/claude-3-7-sonnet-20250219:beta" 
app_id182717
streamedtrue
cancelledfalse
latency434
moderation_latency(null)
generation_time5077
tokens_prompt42
tokens_completion236
native_tokens_prompt44
native_tokens_completion274
native_tokens_reasoning0
num_media_prompt(null)
num_media_completion(null)
num_search_results(null)
origin"https://ncbench.com/" 
is_byokfalse
finish_reason"stop" 
native_finish_reason"stop" 
usage0.004242

Evaluation details

Result Evaluator Details Meta Data
51.8900% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
04
118
217
320
420
519
618
720
819
919
1019