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Run: 2026-09-10-01M25DR5QJ39SP90FQBY1ASTS1
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
19.5s
Cost:
$0.003098
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
Cold rain hammered the old mansion windows as Detective Mara Voss stepped into the candlelit foyer exactly at midnight tonight. A butler with trembling hands led her toward the ancient wooden library where the victim waited silently for her arrival. Lord Edgar Blackwood sprawled across the Persian rug, a silver letter opener buried deep in his bloodied cold still chest. The room smelled of expensive cigars, old books, and something faintly metallic that she recognized immediately as fresh spilled blood. A fierce storm raged outside, thunder shaking the glass while every guest claimed complete ignorance of the entire grisly murder. Detective Voss knelt beside the body, noting the missing signet ring and the victim's strangely calm expression on his face. Outside, distant lightning split the sky as a dark hidden figure silently watched from the garden maze's shadowed far edge. When she turned abruptly, the butler was gone, leaving only dark wet footprints leading toward the conservatory's unlocked old door. Mara slowly drew her weapon, following the old trail as thunder masked the sound of a nearby door clicking shut. The silent conservatory waited, oddly humid and dark, its glass walls streaming with cold rain and something like fresh blood.
created_at
"2026-09-10T10:27:54.744Z"
9/10/2026, 10:27:54 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1044
moderation_latency
(null)
generation_time
19171
tokens_prompt
46
tokens_completion
5182
native_tokens_prompt
65
native_tokens_completion
5147
native_tokens_completion_images
(null)
native_tokens_reasoning
4901
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
0.00309795
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789036074-sdpucinXJ77uKj5IOtVv"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789036074-ALOfPRaNjfjdn1MyK26Y"
upstream_id
"5b54add1-a785-454c-a349-f42174895652"
provider_responses
0
endpoint_id
"fd104bc8-535a-4d31-a847-a8e402e86a02"
id
"5b54add1-a785-454c-a349-f42174895652"
is_byok
false
latency
342
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00309795
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20