NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-10-01M25DFZM008DNQ9C7S6NQF4YR
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
10.1s
Cost:
$0.001552
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
84.62%
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 cold rain tapped softly against the tall library windows. Inside, a grandfather clock counted each heavy, silent, lonely second. Lord Ashcroft sat slumped in his favorite leather chair, unmoving. A silver letter opener glinted deep within his cold chest. Dark blood soaked his white shirt and the Persian rug. The heavy library door stood locked from the inside tonight. No footprints marked the dusty floor, no weapon lay nearby. A single candle still burned beside an empty crystal glass. On the desk, a note read, "Meet me at midnight." The clock struck twelve, and someone knocked twice outside then. Detective Mira Vale arrived then, shaking rain from her coat. She saw the body, and her sharp breath caught hard. "Whoever did this," she whispered, "never left through that door." Outside, the storm swallowed every other sound in town tonight. The killer was already planning another perfect, quiet, final crime.
created_at
"2026-09-10T10:23:26.342Z"
9/10/2026, 10:23:26 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
762
moderation_latency
(null)
generation_time
10057
tokens_prompt
46
tokens_completion
2577
native_tokens_prompt
65
native_tokens_completion
2570
native_tokens_completion_images
(null)
native_tokens_reasoning
2382
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
0.00155175
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789035806-wc4y6RheAYAVcNH2AYLh"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789035806-zY3KhoTA7VKhd9IbbLar"
upstream_id
"3d6e69ac-7bbe-4763-88ec-4e7315d1be96"
provider_responses
0
endpoint_id
"fd104bc8-535a-4d31-a847-a8e402e86a02"
id
"3d6e69ac-7bbe-4763-88ec-4e7315d1be96"
is_byok
false
latency
355
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00155175
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
84.62%
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
20
9
10
10
10
11
20
12
10