NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-04-25-01KQ2DRGKCSZQVTC34KFWVMRVG
Run Details
Model:
DeepSeek V4 Pro
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
4.3s
Cost:
$0.000132
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
97.41%
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 heavy rain obscured the mansion’s gothic silhouette in darkness. A frantic knock shattered the silence of the sprawling estate. The butler’s trembling hand twisted the cold, ornate brass handle. She stood drenched, mascara streaking her pale, horror-stricken face. Her lips moved soundlessly before the terrible words finally came. “He is dead, a knife buried deep within his back.” The library clock immediately began to chime the midnight hour. Inside, the celebrated criminologist calmly set down his whiskey glass. His sharp eyes missed nothing, taking in her muddy hem. The brilliant detective knew this perfect crime was his now.
created_at
"2026-04-25T13:37:42.512Z"
4/25/2026, 1:37:42 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
765
moderation_latency
(null)
generation_time
4269
tokens_prompt
46
tokens_completion
170
native_tokens_prompt
39
native_tokens_completion
132
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
0.000131805
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"fd489d2b-6778-400d-beaa-ede275032df1"
is_byok
false
latency
276
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-1777124262-qdGxcachmiyulGnIa7Op"
session_id
(null)
api_type
"completions"
id
"gen-1777124262-AG5JBVKbr1TVAEaiyRHz"
upstream_id
"fd489d2b-6778-400d-beaa-ede275032df1"
total_cost
0.000131805
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
97.41%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
9
4
10
5
10
6
10
7
10
8
10
9
10