NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-03-01M1KC0R12V6V45AC4FEHMZAS1
Run Details
Model:
DeepSeek V4 Pro 0813 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
43.4s
Cost:
$0.016303
Provider:
Together
Evaluation summary
Score
Evaluator
Details Link
92.31%
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 sat silent beneath a bruised November sky, its windows dark like hollow, watchful, unblinking, very empty eyes. Detective Inspector Ada Frost stepped from her unmarked car and pulled her wool coat tighter against the damp, biting wind. A single constable stood by the iron gate, his face pale and his breath rising in short, nervous little clouds. She nodded once to him, then walked up the gravel path where dead leaves crackled under her steady, deliberate footsteps. The front door hung ajar, and from inside came the faint, coppery smell that every detective learns to recognize well. She pushed the door open with one gloved hand, and the hinges groaned like a warning from the house itself. In the dim hallway, a single brass lamp flickered, casting long shadows that danced across the faded old floral wallpaper. The body lay at the foot of the grand staircase, one arm outstretched as if reaching for something beyond death. Ada knelt beside the still form, noting the single wound at the throat and the strange, very peaceful expression there. A small silver locket lay open near the dead woman's hand, its delicate chain broken and its photograph missing entirely. Constable Reed appeared in the doorway, clearing his throat softly before he spoke in a voice that cracked with unease. "There is no sign of forced entry, ma'am, and the housekeeper swears every door and window was locked from inside." Ada did not look up from the body, but her voice cut through the cold air with quiet, razor-sharp certainty. "Then whoever killed her was already inside this house, or they had a key and knew where to find her."
created_at
"2026-09-03T10:11:18.708Z"
9/3/2026, 10:11:18 AM
model
"deepseek/deepseek-v4-pro-20260813"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
460
moderation_latency
(null)
generation_time
43300
tokens_prompt
46
tokens_completion
3864
native_tokens_prompt
39
native_tokens_completion
4104
native_tokens_completion_images
(null)
native_tokens_reasoning
3761
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"
service_tier
(null)
usage
0.01630332
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788430278-PFAidbBve30DvCBHS8Nt"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788430278-TiM5WHi8VjxGUHS30k8r"
upstream_id
"fd583085-aws_ue2"
provider_responses
0
endpoint_id
"218b0cec-3278-4b88-8ee0-3f346eccd35f"
id
"fd583085-aws_ue2"
is_byok
false
latency
460
model_permaslug
"deepseek/deepseek-v4-pro-20260813"
provider_name
"Together"
status
200
total_cost
0.01630332
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Together"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
92.31%
Matches word count
n/a
neededClean
false
sentences
13
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20
10
20
11
40
12
20