Run: 2026-04-25-01KQ2GVYFG8KN090TKCZA1YK8G

Run Details

Duration:
1m 39s
Cost:
$0.003896
Provider:
DeepSeek

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 old manor stood silent beneath a weeping sky, its windows dark like vacant eyes staring into nothing, utterly forlorn. Detective Inspector Hargrave arrived in a long coat, his collar upturned against the persistent drizzle that misted all in grey. A constable stood by the oaken front door, his face pale as the moonlight filtering through the heavy, brooding clouds. Hargrave nodded, stepping inside where the air smelled of old wood, dust, and something metallic, sharp and very deeply unsettling. The body lay sprawled in the library, a crystal decanter shattered beside an outstretched hand, its contents staining the rug. Hargrave knelt, observing the victim’s frozen expression of surprise, not fear, which intrigued him greatly, an odd and telling detail. No obvious wounds were visible, yet the broken glass and faint scent of almonds hinted at a sinister little secret. Outside, the wind howled like a mourning widow, rattling the ancient windowpanes in their leaded frames, groaning a mournful lament.
created_at"2026-04-25T14:32:02.273Z" 4/25/2026, 2:32:02 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency989
moderation_latency(null)
generation_time97097
tokens_prompt46
tokens_completion3686
native_tokens_prompt39
native_tokens_completion4459
native_tokens_completion_images(null)
native_tokens_reasoning4243
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"
usage0.003896295
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"451db2a8-df88-46a3-8b0c-6b44ce4884c8"
is_byokfalse
latency278
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-1777127522-mQaIdHNRVchTNvGeRwyl"
session_id(null)
api_type"completions"
id"gen-1777127522-XBEpNiVDRo7q4nQd7Dl4"
upstream_id"451db2a8-df88-46a3-8b0c-6b44ce4884c8"
total_cost0.003896295
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720