NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-20-01M5C69B8J2YF0ZB00HGDDDX6E
Run Details
Model:
DeepSeek V4.1 Flash 1017 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
25.0s
Cost:
$0.001005
Provider:
Wafer
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 rain tapped softly against the tall, dark library windows. Inside, Detective Mara Voss studied the body by the chair. A brass lamp cast long shadows across the oak floor. His silk tie was loosened, and his glasses lay shattered. Mara knelt beside him and gently checked for a pulse. There was none, but the room smelled of bitter almonds. She rose and noticed a fresh scratch on his wrist. The library door was locked from inside, which seemed impossible. A storm raged outside, trapping everyone in the old mansion. Mara looked at the silent guests gathered in the hallway. Each face wore fear; each alibi sounded far too rehearsed. Then the clock struck midnight, and the chandelier flickered once. Mara whispered, “Nobody leaves until I know who killed him.”
created_at
"2026-10-20T08:19:15.353Z"
10/20/2026, 8:19:15 AM
model
"deepseek/deepseek-v4.1-flash-20261017"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
332
moderation_latency
(null)
generation_time
24942
tokens_prompt
46
tokens_completion
1921
native_tokens_prompt
65
native_tokens_completion
1989
native_tokens_completion_images
(null)
native_tokens_reasoning
1797
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
0.0010049
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1792484355-hLyz05D8XJg9VtO3J1Lw"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1792484355-qOrA24byAHJTmKsBPWqG"
upstream_id
"chatcmpl-d34f8c82508b4dd88f98f989ed873164"
provider_responses
0
endpoint_id
"66d4851d-7738-4948-9d40-2ab6dc54f895"
id
"chatcmpl-d34f8c82508b4dd88f98f989ed873164"
is_byok
false
latency
332
model_permaslug
"deepseek/deepseek-v4.1-flash-20261017"
provider_name
"Wafer"
status
200
total_cost
0.0010049
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Wafer"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
13
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10