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Run: 2026-09-10-01M25DFBJNM5PWPG4PXKY9WA85
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
23.5s
Cost:
$0.004130
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 mansion windows while Detective Mara Voss stepped through the heavy oak doors alone and weary at midnight. The butler met her with trembling hands and whispered that Lord Ashcombe had been found dead upstairs only moments ago. Mara climbed the grand staircase, noting the portraits whose painted eyes seemed to follow her every move silently and strangely. At the end of the hall, a door stood open, revealing the study bathed in cold moonlight and faint shadows. Lord Ashcombe lay sprawled beside his desk, a silver letter opener buried deep within his chest, blood soaking his shirt. His eyes remained wide open, staring at the ceiling as if accusing the cold silent darkness above him now forevermore. Mara knelt beside the corpse, her breath steady, then slowly examined the strange purple mark upon his pale throat carefully. The wound on his chest seemed clean, but that purple bruise suggested poison had already stopped his heart before death. A grandfather clock in the corner ticked loudly, though its hands remained frozen at exactly twelve minutes past three forever. On the desk lay a glass of whiskey, a crumpled note, and a key oddly shaped like a black raven. Mara read the note aloud and whispered softly, "You were never supposed to inherit this estate at all, dear brother." Outside, thunder rolled suddenly, and somewhere deep within the old mansion, a single floorboard creaked under a very careful footstep. Mara rose slowly, drew her weapon, and turned toward the corridor where the unseen watcher waited in cold patient darkness. Someone in this old house had killed Lord Ashcombe, and Mara truly intended to discover exactly who before the dawn.
created_at
"2026-09-10T10:23:05.817Z"
9/10/2026, 10:23:05 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
985
moderation_latency
(null)
generation_time
23463
tokens_prompt
46
tokens_completion
6877
native_tokens_prompt
65
native_tokens_completion
6867
native_tokens_completion_images
(null)
native_tokens_reasoning
6530
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
0.00412995
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789035785-Ew7TpsSaKbOXj3QOIQyd"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789035785-ktAbKLHjPuMtqSYM1vGZ"
upstream_id
"729087cb-337b-4e98-814a-80f01db38cd0"
provider_responses
0
endpoint_id
"fd104bc8-535a-4d31-a847-a8e402e86a02"
id
"729087cb-337b-4e98-814a-80f01db38cd0"
is_byok
false
latency
362
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00412995
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
14
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