Model

Claude 3.7 Sonnet

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-02-24-01JMWZZJSTJXCF37FSEHTGNJK6

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 wind howls through the empty streets, carrying whispers of secrets buried deep within the small coastal town. Detective Sarah Morgan steps out of her car, the scent of salt and impending rain filling her nostrils. Yellow police tape flutters across the entrance to the dilapidated lighthouse where a body was discovered hours ago. She nods at the officer guarding the scene, her experienced eyes already scanning for details others might miss. The victim lies sprawled at the base of the spiral staircase, blood pooling around his expensive suit and shoes. "Prominent local businessman Thomas Wellington," explains the young officer, his face pale in the beam of her flashlight. Sarah kneels beside the body, noting the strange symbol carved into the palm of the victim's right hand. A distinctive antique pocket watch lies shattered near the corpse, its hands frozen eternally at precisely midnight last night. Footprints in the dust suggest the killer lingered, perhaps watching their victim's final moments with curious, callous detachment.
id"gen-1740434820-X37k30xik9skovuq6Re5" 
upstream_id"msg_01TWKv5GyBmv5HbbpCjHQhGc" 
total_cost0.003582
cache_discount(null)
provider_name"Anthropic" 
created_at"2025-02-24T22:07:05.304663+00:00" Monday, February 24th, 2025 at 10:07:05 PM GMT+00:00
model"anthropic/claude-3-7-sonnet-20250219:beta" 
app_id182717
streamedtrue
cancelledfalse
latency413
moderation_latency(null)
generation_time4095
tokens_prompt42
tokens_completion202
native_tokens_prompt44
native_tokens_completion230
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" 
usage0.003582

Evaluation details

Result Evaluator Details Meta Data
24.0045% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
018
118
218
318
419
518
618
719
818