Run: 2026-04-25-01KQ2GMQMN2JRG9Y92VV5FQBYH

Run Details

Duration:
7.9s
Cost:
$0.000217
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
11.71% 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 old Victorian house stood silent and empty beneath a heavy, bruise-colored evening sky this Tuesday. Detective Inspector Miles began to whistle a tuneless song as his worn shoes crunched on the gravel. A single pale light burned behind the parlor’s thick velvet curtains, defying the deepening dusk outside. He found the front door already slightly ajar, its brass handle smeared with a dark, wet stain. Inside, the grandfather clock ticked on stubbornly, marking seconds that no living person seemed to count. A woman’s body lay crumpled on the Persian rug, one hand still clutching a shattered crystal champagne flute. Her unblinking eyes stared up at the ornate ceiling, frozen forever in a moment of pure, refined terror. There was no sign of a struggle anywhere else in the perfectly ordered, dustless, and obsessively neat room. A single red rose rested on the marble mantelpiece, its stem wrapped tightly in a black satin ribbon. Miles did not touch the rose, for he understood at once it was not a tribute but a signature.
created_at"2026-04-25T14:28:04.377Z" 4/25/2026, 2:28:04 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1134
moderation_latency(null)
generation_time7820
tokens_prompt46
tokens_completion272
native_tokens_prompt39
native_tokens_completion230
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"stop"
usage0.000217065
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"8014bad5-59ae-4f49-b0ec-0ef46c7a3482"
is_byokfalse
latency512
model_permaslug"deepseek/deepseek-v4-pro-20260423"
provider_name"DeepSeek"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777127284-XtQrHcAagrndirFR8beT"
session_id(null)
api_type"completions"
id"gen-1777127284-RAZh2TTwwsiH0SRc3P41"
upstream_id"8014bad5-59ae-4f49-b0ec-0ef46c7a3482"
total_cost0.000217065
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
11.71% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
016
117
216
317
416
518
618
718
818
919