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Run: 2026-04-25-01KQ2DPGF73H4FC8J4PNNBRQKZ
Run Details
Model:
DeepSeek V4 Pro
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.4s
Cost:
$0.000202
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
5.75%
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 Victorian house stood silent against the moonless night, its windows dark and empty. Detective Marlowe stepped carefully over the threshold, his flashlight beam cutting through the oppressive darkness. A single lamp flickered weakly in the study, casting long shadows across the lifeless body on the floor. The air smelled of burnt coffee and something metallic, a scent he recognized instantly as freshly spilled blood. He knelt beside the victim, noting the single crimson rose placed deliberately across her still chest. A shattered teacup lay near her outstretched hand, its porcelain fragments glinting like scattered bone beneath him. His eyes moved slowly to the mantelpiece where a photograph of the woman now lay inexplicably face down. He pulled out his notepad and recorded the strange pose, the flower, and the absolute silence around him. Outside, the fog pressed against the windowpanes like a curious specter trying to glimpse the crime inside. This was no random act of violence; this was a message written with terrible care and precision.
created_at
"2026-04-25T13:36:36.843Z"
4/25/2026, 1:36:36 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1145
moderation_latency
(null)
generation_time
5934
tokens_prompt
46
tokens_completion
278
native_tokens_prompt
39
native_tokens_completion
213
native_tokens_completion_images
(null)
native_tokens_reasoning
0
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
0.000202275
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"aca5a82a-4105-4a1e-a225-0fc877109dfa"
is_byok
false
latency
279
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-1777124196-0lBfAbIYDgqd8d18pfon"
session_id
(null)
api_type
"completions"
id
"gen-1777124196-R73XCpo12CHEBNWUYhdj"
upstream_id
"aca5a82a-4105-4a1e-a225-0fc877109dfa"
total_cost
0.000202275
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
5.75%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
15
1
15
2
18
3
18
4
16
5
17
6
18
7
18
8
17
9
17