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Run: 2026-04-25-01KQ2E0B2XD2W96AYJWM11N0T4
Run Details
Model:
DeepSeek V4 Pro (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
31.4s
Cost:
$0.001237
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The old mansion stood silent beneath the stormy midnight sky. Inside, a single candle flickered in the dusty library room. Detective Harris examined the body sprawled across the Persian rug. A silver dagger protruded from the victim's chest, still gleaming. No signs of forced entry, just an open window nearby. Rain lashed against the glass, masking any sounds of struggle. The victim's glass of wine remained untouched on the desk. A cryptic note lay crumpled in his cold, clenched fist. The note read: "The past never dies; it only waits." Harris narrowed his eyes, sensing the killer's lingering presence nearby. This case would unravel secrets buried for twenty dark years.
created_at
"2026-04-25T13:41:59.009Z"
4/25/2026, 1:41:59 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
900
moderation_latency
(null)
generation_time
31371
tokens_prompt
46
tokens_completion
1386
native_tokens_prompt
39
native_tokens_completion
1402
native_tokens_completion_images
(null)
native_tokens_reasoning
1261
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
0.001236705
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"ea92ebe1-55bb-4ab9-9035-1ba592fb3804"
is_byok
false
latency
285
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-1777124519-n1J9r2jLh4Enkng2BaNg"
session_id
(null)
api_type
"completions"
id
"gen-1777124519-EKbOieUmWN50UetTtzGp"
upstream_id
"ea92ebe1-55bb-4ab9-9035-1ba592fb3804"
total_cost
0.001236705
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
11
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10