Model

Claude 3.7 Sonnet

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-02-24-01JMX1JC6MQK3FM6FF9C3MS5EX

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
Detective Sarah Morgan arrived at the crime scene, her breath forming clouds in the cold November air. Yellow police tape fluttered in the breeze, marking off the area where the body had been discovered. The victim lay sprawled on expensive marble tiles, one hand clutching a torn photograph, the other empty. Blood had pooled beneath his head, creating a dark halo that contrasted sharply with his pale skin. Sarah knelt beside the corpse, careful not to disturb potential evidence as she examined the fatal wound. "Blunt force trauma to the back of the head," she muttered, noticing an unusual pattern in the injury. A crystal paperweight lay nearby, its once-pristine surface now smeared with what appeared to be blood. The mansion's opulence felt hollow now, its expensive furnishings mere witnesses to the violent act committed here. "Time of death estimated between midnight and three AM," announced the medical examiner, looking up from below. Sarah noted the victim's watch had stopped at exactly twelve thirty-two, its crystal face shattered beyond repair.
id"gen-1740436484-KVTmjvlJ3qMDRpywGhIW" 
upstream_id"msg_01S7T27MaRxm2RKwbAxb9rfJ" 
total_cost0.003717
cache_discount(null)
provider_name"Anthropic" 
created_at"2025-02-24T22:34:49.419912+00:00" Monday, February 24th, 2025 at 10:34:49 PM GMT+00:00
model"anthropic/claude-3-7-sonnet-20250219:beta" 
app_id182717
streamedtrue
cancelledfalse
latency353
moderation_latency(null)
generation_time3831
tokens_prompt42
tokens_completion210
native_tokens_prompt44
native_tokens_completion239
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" 
usage0.003717

Evaluation details

Result Evaluator Details Meta Data
3.5954% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
017
117
217
317
417
518
617
717
817
918