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Run: 2026-09-10-01M25DTBD7JM9033QTX4FRHJZT
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
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
Messages
Meta
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_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
674
moderation_latency
(null)
generation_time
16046
tokens_prompt
46
tokens_completion
4233
native_tokens_prompt
65
native_tokens_completion
4319
native_tokens_completion_images
(null)
native_tokens_reasoning
3955
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
service_tier
(null)
usage
0.00260115
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_byok
false
latency
340
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00260115
cache_discount
(null)
upstream_inference_cost
0
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
neededClean
false
sentences
15
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20
10
20
11
20
12
20
13
20
14
20