Model

Claude 3.7 Sonnet

Test

N-Length Sentences

Scenario

Write sentences with 20 words each

Run ID

2025-02-24-01JMX1740VS8AX94N3RFNQ0TM0

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 stood at the edge of the crime scene, her eyes scanning the bloodstained floor methodically. Rain pounded against the windows of the abandoned warehouse, creating a rhythmic backdrop to the grim tableau before her. The victim lay sprawled across an antique desk, one hand clutching a torn photograph, the other frozen in midair. Medical examiner Dr. Reynolds crouched beside the body, his weathered face revealing nothing as he noted the peculiar wounds. "Killed approximately twelve hours ago, single puncture wound to the neck, but there's something odd about the entry point." Detective Morgan nodded silently, her attention drawn to a peculiar pattern of water droplets leading away from the scene. Officer Jenkins approached with evidence bags, his normally cheerful demeanor subdued by the macabre scene surrounding them all. "We found this hidden inside the victim's watch—a microchip containing encrypted data that nobody can seem to access." Through the broken skylight above, moonlight illuminated a strange symbol painted on the floor beneath the victim's body. Sarah's phone buzzed with a message from an unknown number: "The timekeeper knows why the blackbird sings at midnight."
id"gen-1740436115-oKCb9RN9xXJWmSpVOQlK" 
upstream_id"msg_0129MXyKvrMRBQPG7kckZrj3" 
total_cost0.004107
cache_discount(null)
provider_name"Anthropic" 
created_at"2025-02-24T22:28:41.365322+00:00" Monday, February 24th, 2025 at 10:28:41 PM GMT+00:00
model"anthropic/claude-3-7-sonnet-20250219:beta" 
app_id182717
streamedtrue
cancelledfalse
latency273
moderation_latency(null)
generation_time4708
tokens_prompt42
tokens_completion234
native_tokens_prompt44
native_tokens_completion265
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" 
usage0.004107

Evaluation details

Result Evaluator Details Meta Data
46.5172% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
018
119
219
319
419
519
618
719
818
919