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Run: 2026-04-25-01KQ2GF808G7DMNVDB3Q2CXJQ2
Run Details
Model:
DeepSeek V4 Pro
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
9.8s
Cost:
$0.000346
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
6.48%
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 manor stood silent beneath a bruised and swollen evening sky, rain threatening violently. Detective Marlowe pulled his coat tighter against the biting wind and stared at the bloodstained threshold ahead. A single gunshot had shattered the dinner party, leaving the wealthy recluse Harrison Blackwood dead on arrival. Now the heavy oak door creaked open on its own, revealing a foyer flickering with nervous candlelight shadows. Seven guests stood frozen in the grand hall, their faces a gallery of poorly disguised shock and guilt. Each person wore an identical expression of horror, yet every alibi was suspiciously perfect and deeply rehearsed. Marlowe stepped inside and felt the weight of a thousand secrets pressing silently against the flocked wallpaper. His assistant, young Officer Finch, swallowed hard and nervously touched the revolver still holstered at his hip. The victim’s niece, a pale woman in emerald silk, was the first to finally break the suffocating quiet. “We all heard the shot,” she whispered, “but nobody saw a thing, and nobody left this very room.” Marlowe’s gaze drifted to the grand piano, where a half-empty crystal glass sweated beside a torn sheet music. Somewhere deeper in the house, a mechanical clock began to chime midnight with an eerie, almost mournful delay. The detective allowed himself the faintest, thinnest smile as he recognized the perfect, inescapable trap before him. Every person present had a motive, and every single one had the means, sealed inside this storm-locked cage. He cleared his throat slowly, letting the tension coil around each suspect like a slowly tightening noose. “Ladies and gentlemen,” Marlowe announced calmly, “the murderer is still standing in this room with us now.”
created_at
"2026-04-25T14:25:04.524Z"
4/25/2026, 2:25:04 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1331
moderation_latency
(null)
generation_time
9697
tokens_prompt
46
tokens_completion
467
native_tokens_prompt
39
native_tokens_completion
378
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
0.000345825
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"78529b42-caf5-400a-8278-e6accfd32005"
is_byok
false
latency
390
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-1777127104-b5tWVuVcwfuCpR9pYvl7"
session_id
(null)
api_type
"completions"
id
"gen-1777127104-xdUNILs15hxx1LH6K4dZ"
upstream_id
"78529b42-caf5-400a-8278-e6accfd32005"
total_cost
0.000345825
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
6.48%
Matches word count
n/a
neededClean
false
sentences
16
wordCounts
0
16
1
17
2
17
3
18
4
18
5
17
6
17
7
17
8
18
9
18
10
18
11
18
12
17
13
18
14
17
15
17