Run: 2026-04-24-01KPZTZTM27W13E6EF65YX72DE

Run Details

Duration:
6.1s
Cost:
$0.011775
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
49.67% 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

AI
Rain lashed against the windows of Blackthorn Manor as Detective Sarah Chen stepped carefully across the threshold into darkness. The butler stood trembling beside the grand staircase, his weathered hands clutching a silver tray with obvious difficulty. Lightning illuminated the foyer briefly, revealing crimson footprints leading away from the body sprawled across the marble floor. Lord Pemberton lay motionless in his evening attire, a jeweled letter opener protruding from between his stiffened shoulder blades. Sarah knelt beside the corpse, noting the peculiar expression frozen upon the dead aristocrat's surprisingly peaceful aging face. Five guests huddled together in the adjacent parlor, their whispered conversations ceasing immediately upon her measured, deliberate arrival. Each suspect wore expensive clothing stained with something darker than wine, though nobody seemed willing to acknowledge this fact. The grandfather clock chimed midnight exactly, its mournful tones echoing through corridors that had witnessed generations of Pemberton family secrets. Sarah removed her notebook slowly, understanding that somewhere within these walls hid a murderer wearing a perfectly convincing innocent mask. Tonight, she knew, would test every investigative skill she had painstakingly acquired during fifteen years of solving impossible crimes.
created_at"2026-04-24T13:31:10.353Z" 4/24/2026, 1:31:10 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1011
moderation_latency(null)
generation_time6034
tokens_prompt46
tokens_completion339
native_tokens_prompt65
native_tokens_completion458
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
usage0.011775
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"e33e7342-0323-4177-b0e4-eeaf5647b2cb"
is_byokfalse
latency1011
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777037470-fTKMSxQtzvvRP0aikhDH"
session_id(null)
api_type"completions"
id"gen-1777037470-qqYWt1FXEcLMRKtZzmpy"
upstream_id"e33e7342-0323-4177-b0e4-eeaf5647b2cb"
total_cost0.011775
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
49.67% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
019
118
218
319
418
518
619
720
820
919