Run: 2026-07-25-01KYCR7NTK57G26BT32QR6T0H7

Run Details

Duration:
47.4s
Cost:
$0.115975
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
The rain had been falling on Ashgrove Manor since midnight, and by dawn the gravel drive resembled a shallow river. Inspector Halloway arrived at seven, boots soaked through, holding a black umbrella that the wind had already turned inside out. The housemaid who had discovered the body stood beneath the portico, wringing her apron, unable to speak a single word. Her name was Nell, she was nineteen years old, and she would never enter the east library again after today. Sir Edmund Verrell lay face down across his desk, one hand gripping a fountain pen, black ink pooling beneath it. The wound sat at the back of his skull, deep and narrow, clearly the work of something heavy and deliberate. Nothing had been stolen, every window was latched, and the heavy oak library door had been locked from the inside. Halloway crouched beside the body, studied the pen, and asked the trembling maid what time she had brought the tea. Half past six, she whispered, and he was already cold, sir, although the green desk lamp was still burning brightly. Somewhere above them a floorboard creaked, and Halloway looked slowly up, counting the seven guests he had not yet met. One of them had killed him, and the rain, mercifully, would keep all of them inside the house until nightfall.
created_at"2026-07-25T13:43:02.237Z" 7/25/2026, 1:43:02 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
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cancelledfalse
latency4359
moderation_latency96
generation_time47129
tokens_prompt46
tokens_completion911
native_tokens_prompt60
native_tokens_completion4627
native_tokens_completion_images(null)
native_tokens_reasoning592
native_tokens_cached0
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num_input_audio_prompt(null)
num_media_completion0
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origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.115975
router(null)
provider_responses
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endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNse4xVAYCfJBWgVraNZ"
is_byokfalse
latency1738
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784986982-ECN39TeeLM3hwoG6Xl9V"
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api_type"completions"
id"gen-1784986982-KP8AQuWMF8pdeHQB16SD"
upstream_id"msg_011CdNse4xVAYCfJBWgVraNZ"
total_cost0.115975
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
sentences11
wordCounts
020
120
220
320
420
520
620
720
820
920
1020