Run: 2026-07-01-01KWEAGYMK1AN2XRZ5062B639B

Run Details

Duration:
42.0s
Cost:
$0.059740
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
100.00% 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 fell steadily on the old manor's rooftop, while shadows crept slowly across the darkened, silent hallways within its walls. Detective Sarah Mills stood quietly beneath the grand old entrance, staring intently at the heavy oak door left slightly ajar. Something felt terribly wrong that evening, as an eerie silence hung heavily over the once peaceful, elegant countryside estate grounds. She pushed the heavy door open carefully, revealing a dimly lit foyer filled with broken glass and overturned antique furniture. A single scream had echoed loudly through the darkened halls only minutes before, sharp and full of pure terror still. Now, only silence remained, broken faintly by Sarah's own careful, measured footsteps echoing slowly across the cold marble floor below. Then she saw it clearly now: a man's body lying motionless near the base of the grand old marble staircase. Blood pooled slowly beneath him, dark and glistening under the dim light of the flickering old brass chandelier above her.
created_at"2026-07-01T07:50:31.327Z" 7/1/2026, 7:50:31 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3672
moderation_latency(null)
generation_time41927
tokens_prompt46
tokens_completion723
native_tokens_prompt60
native_tokens_completion5962
native_tokens_completion_images(null)
native_tokens_reasoning471
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"
service_tier"default"
usage0.05974
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_016DPy9rkod34gjo4KD4Whmj"
is_byokfalse
latency1645
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782892231-Cvj1BEmmcPwNwiQUnbaC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782892231-iTWPjU1tAbSSGxwAhmqQ"
upstream_id"msg_016DPy9rkod34gjo4KD4Whmj"
total_cost0.05974
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720