Run: 2026-04-25-01KQ2GF808G7DMNVDB3Q2CXJQ2

Run Details

Duration:
9.8s
Cost:
$0.000346
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
6.48% 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 manor stood silent beneath a bruised and swollen evening sky, rain threatening violently. Detective Marlowe pulled his coat tighter against the biting wind and stared at the bloodstained threshold ahead. A single gunshot had shattered the dinner party, leaving the wealthy recluse Harrison Blackwood dead on arrival. Now the heavy oak door creaked open on its own, revealing a foyer flickering with nervous candlelight shadows. Seven guests stood frozen in the grand hall, their faces a gallery of poorly disguised shock and guilt. Each person wore an identical expression of horror, yet every alibi was suspiciously perfect and deeply rehearsed. Marlowe stepped inside and felt the weight of a thousand secrets pressing silently against the flocked wallpaper. His assistant, young Officer Finch, swallowed hard and nervously touched the revolver still holstered at his hip. The victim’s niece, a pale woman in emerald silk, was the first to finally break the suffocating quiet. “We all heard the shot,” she whispered, “but nobody saw a thing, and nobody left this very room.” Marlowe’s gaze drifted to the grand piano, where a half-empty crystal glass sweated beside a torn sheet music. Somewhere deeper in the house, a mechanical clock began to chime midnight with an eerie, almost mournful delay. The detective allowed himself the faintest, thinnest smile as he recognized the perfect, inescapable trap before him. Every person present had a motive, and every single one had the means, sealed inside this storm-locked cage. He cleared his throat slowly, letting the tension coil around each suspect like a slowly tightening noose. “Ladies and gentlemen,” Marlowe announced calmly, “the murderer is still standing in this room with us now.”
created_at"2026-04-25T14:25:04.524Z" 4/25/2026, 2:25:04 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1331
moderation_latency(null)
generation_time9697
tokens_prompt46
tokens_completion467
native_tokens_prompt39
native_tokens_completion378
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"
usage0.000345825
router(null)
provider_responses
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endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"78529b42-caf5-400a-8278-e6accfd32005"
is_byokfalse
latency390
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-1777127104-b5tWVuVcwfuCpR9pYvl7"
session_id(null)
api_type"completions"
id"gen-1777127104-xdUNILs15hxx1LH6K4dZ"
upstream_id"78529b42-caf5-400a-8278-e6accfd32005"
total_cost0.000345825
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
6.48% Matches word count n/a
neededCleanfalse
sentences16
wordCounts
016
117
217
318
418
517
617
717
818
918
1018
1118
1217
1318
1417
1517