Run: 2026-07-01-01KWEA5598D3ZPWVZ1PT7102YP

Run Details

Duration:
15.1s
Cost:
$0.006440
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
0.18% 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
# The Fourth Guest Rain hammered the windows of Blackwood Manor as the clock struck midnight without any warning. Detective Sarah Chen stepped through the doorway, her coat dripping onto the ancient Persian rug beneath her. The body lay sprawled across the study floor, blood pooling beneath the antique mahogany writing desk nearby. "Nobody leaves this house," she announced, scanning the six guests gathered nervously near the fireplace. Lord Pemberton's throat had been slit with surgical precision, suggesting the killer possessed considerable medical knowledge somehow. The butler wrung his hands anxiously, avoiding eye contact with everyone except the flickering candles above. Sarah noticed the missing letter opener, its absence more telling than any fingerprint left behind. Three of the guests claimed they'd been sleeping, yet none could verify each other's alibis convincingly. The victim's wife stood silently by the window, staring into darkness that mirrored her hollow expression. Something about her composure struck Sarah as rehearsed, like an actress waiting for her cue. Thunder cracked outside as the lights flickered once, casting strange shadows across the crime scene. "This storm isn't leaving anytime soon," muttered the young detective assigned to assist with evidence collection. Sarah knelt beside the body, examining a torn photograph clutched tightly in Pemberton's cold fingers. The image showed four people standing together, though someone had deliberately scratched out one face. She recognized the garden gate behind them, the same one visible through the study window. Whatever happened tonight, Sarah suspected, had roots stretching back through years of buried secrets. The six suspects watched her work, each hiding something behind their carefully constructed masks of grief. One of them was lying, and Sarah intended to discover exactly who before dawn arrived.
created_at"2026-07-01T07:44:04.918Z" 7/1/2026, 7:44:04 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
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cancelledfalse
latency5782
moderation_latency250
generation_time14844
tokens_prompt46
tokens_completion508
native_tokens_prompt60
native_tokens_completion632
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"
service_tier"default"
usage0.00644
router(null)
provider_responses
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endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01NEvSwGhsTG92W7KZ1PwGXf"
is_byokfalse
latency5731
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-1782891844-FNVbZPO8GZVpynxwdzge"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891844-a6zw6aybWNFRcvCdkc4l"
upstream_id"msg_01NEvSwGhsTG92W7KZ1PwGXf"
total_cost0.00644
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
0.18% Matches word count n/a
neededCleanfalse
sentences19
wordCounts
04
115
217
317
415
517
616
715
816
916
1015
1115
1216
1315
1415
1515
1614
1716
1815