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Run: 2026-04-25-01KQ2GVYFG8KN090TKCZA1YK8G
Run Details
Model:
DeepSeek V4 Pro (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1m 39s
Cost:
$0.003896
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
The old manor stood silent beneath a weeping sky, its windows dark like vacant eyes staring into nothing, utterly forlorn. Detective Inspector Hargrave arrived in a long coat, his collar upturned against the persistent drizzle that misted all in grey. A constable stood by the oaken front door, his face pale as the moonlight filtering through the heavy, brooding clouds. Hargrave nodded, stepping inside where the air smelled of old wood, dust, and something metallic, sharp and very deeply unsettling. The body lay sprawled in the library, a crystal decanter shattered beside an outstretched hand, its contents staining the rug. Hargrave knelt, observing the victim’s frozen expression of surprise, not fear, which intrigued him greatly, an odd and telling detail. No obvious wounds were visible, yet the broken glass and faint scent of almonds hinted at a sinister little secret. Outside, the wind howled like a mourning widow, rattling the ancient windowpanes in their leaded frames, groaning a mournful lament.
created_at
"2026-04-25T14:32:02.273Z"
4/25/2026, 2:32:02 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
989
moderation_latency
(null)
generation_time
97097
tokens_prompt
46
tokens_completion
3686
native_tokens_prompt
39
native_tokens_completion
4459
native_tokens_completion_images
(null)
native_tokens_reasoning
4243
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"
usage
0.003896295
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"451db2a8-df88-46a3-8b0c-6b44ce4884c8"
is_byok
false
latency
278
model_permaslug
"deepseek/deepseek-v4-pro-20260423"
provider_name
"DeepSeek"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777127522-mQaIdHNRVchTNvGeRwyl"
session_id
(null)
api_type
"completions"
id
"gen-1777127522-XBEpNiVDRo7q4nQd7Dl4"
upstream_id
"451db2a8-df88-46a3-8b0c-6b44ce4884c8"
total_cost
0.003896295
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20