Run: 2026-07-01-01KWEA4EACDPHHZWVKMB9HWW3P

Run Details

Duration:
9.2s
Cost:
$0.005360
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
0.01% 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 Last Guest Rain hammered the old mansion's windows while thunder rolled across the darkened hills like distant drums. Detective Sarah Chen stepped through the doorway, her flashlight cutting through the musty, shadowed hallway. The body lay motionless near the fireplace, blood pooling slowly across the antique Persian rug beneath. Seven guests had gathered that evening for what should have been an ordinary dinner party celebration. Now six remained, each one nervously avoiding eye contact with the detective and each other. "Nobody leaves this house," Sarah announced, studying the frightened faces illuminated by flickering candlelight around her. The victim, wealthy businessman Charles Whitmore, had been stabbed once through his cold, unbeating heart. Rain continued pounding against the windows as if nature itself demanded answers to this mystery. Sarah knelt beside the body, noting the expensive watch still ticking on his lifeless wrist. Someone in this house was lying, and she intended to discover exactly who that person was. The butler cleared his throat nervously, glancing toward the grand staircase leading to darkened upper floors. "Detective," he whispered, "there's something you should know about what happened here tonight before dinner." Lightning flashed outside, momentarily illuminating fear etched deeply into every guest's pale, sweating face. Sarah stood slowly, her eyes narrowing as she surveyed the room full of suspects. Whatever secrets this mansion held, she would uncover them before the storm finally passed tonight.
created_at"2026-07-01T07:43:41.398Z" 7/1/2026, 7:43:41 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1720
moderation_latency(null)
generation_time9180
tokens_prompt46
tokens_completion417
native_tokens_prompt60
native_tokens_completion524
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native_tokens_reasoning0
native_tokens_cached0
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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"
usage0.00536
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01SqrvP5dMA9yJS1z2HrNFrB"
is_byokfalse
latency1720
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-1782891821-0AxEiYnF90vWsc2JiqnU"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891821-a7ZhV0kiw9Bo5AQ4f7ah"
upstream_id"msg_01SqrvP5dMA9yJS1z2HrNFrB"
total_cost0.00536
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
0.01% Matches word count n/a
neededCleanfalse
sentences16
wordCounts
04
116
215
316
416
515
616
715
815
915
1016
1116
1215
1314
1414
1515