Run: 2026-09-10-01M25DTBD7JM9033QTX4FRHJZT

Run Details

Duration:
16.1s
Cost:
$0.002601
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
Rain hammered the midnight streets as Detective Mara Voss stepped beneath the yellow crime scene tape and shivered once again. The penthouse smelled of expensive perfume, copper blood, and the stale smoke from dying candles near the open balcony doors. A woman in a silver gown lay sprawled across the marble floor, her eyes wide open and her lips blue. Detective Voss knelt beside her, noting the single red rose placed carefully upon her unmoving chest like a final insult. No wound marked the body, no weapon lay nearby, and no obvious cause of death appeared anywhere in this room. The balcony doors stood open, yet the heavy curtains hung perfectly still in the windless night, cold air beyond them. On the glass table, a half-empty wine glass bore faint lipstick matching the victim's shade, the first officer later noted. A small black notebook lay beneath the sofa, its pages torn and its cover smeared with something dark and wet. Voss opened it carefully, revealing one handwritten line: The rose blooms only when the guilty confess before the final dawn. Behind her, the elevator chimed softly, and a shadow moved just beyond the rain-streaked glass of the polished hallway mirror. Detective Voss turned, but the corridor stood empty except for a single wet footprint pointing toward the old service stairs. She followed it slowly, her pulse quickening as the storm rattled the high windows above her and thunder rolled nearby. At the stairwell door, a second rose waited, tied with a black silk ribbon and a small, unsigned white card. Voss picked up the card, turned it over, and read two words written in fresh ink: You are next, Detective. Somewhere below, a door slammed shut, and the rain began falling harder against the roof like a warning from above.
created_at"2026-09-10T10:29:06.092Z" 9/10/2026, 10:29:06 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency674
moderation_latency(null)
generation_time16046
tokens_prompt46
tokens_completion4233
native_tokens_prompt65
native_tokens_completion4319
native_tokens_completion_images(null)
native_tokens_reasoning3955
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"
service_tier(null)
usage0.00260115
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789036146-60eVLWHJxCOwGJZ3RFhx"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789036146-4Lze2sjrdSwNpg14N807"
upstream_id"4025404f-1fb6-4d3a-baac-fe2e96021d09"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"4025404f-1fb6-4d3a-baac-fe2e96021d09"
is_byokfalse
latency340
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00260115
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences15
wordCounts
020
120
220
320
420
520
620
720
820
920
1020
1120
1220
1320
1420