Run: 2026-04-25-01KQ2DPGF73H4FC8J4PNNBRQKZ

Run Details

Duration:
6.4s
Cost:
$0.000202
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
5.75% 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 against the moonless night, its windows dark and empty. Detective Marlowe stepped carefully over the threshold, his flashlight beam cutting through the oppressive darkness. A single lamp flickered weakly in the study, casting long shadows across the lifeless body on the floor. The air smelled of burnt coffee and something metallic, a scent he recognized instantly as freshly spilled blood. He knelt beside the victim, noting the single crimson rose placed deliberately across her still chest. A shattered teacup lay near her outstretched hand, its porcelain fragments glinting like scattered bone beneath him. His eyes moved slowly to the mantelpiece where a photograph of the woman now lay inexplicably face down. He pulled out his notepad and recorded the strange pose, the flower, and the absolute silence around him. Outside, the fog pressed against the windowpanes like a curious specter trying to glimpse the crime inside. This was no random act of violence; this was a message written with terrible care and precision.
created_at"2026-04-25T13:36:36.843Z" 4/25/2026, 1:36:36 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1145
moderation_latency(null)
generation_time5934
tokens_prompt46
tokens_completion278
native_tokens_prompt39
native_tokens_completion213
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"
usage0.000202275
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"aca5a82a-4105-4a1e-a225-0fc877109dfa"
is_byokfalse
latency279
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-1777124196-0lBfAbIYDgqd8d18pfon"
session_id(null)
api_type"completions"
id"gen-1777124196-R73XCpo12CHEBNWUYhdj"
upstream_id"aca5a82a-4105-4a1e-a225-0fc877109dfa"
total_cost0.000202275
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
5.75% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
015
115
218
318
416
517
618
718
817
917