NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-03-01M1KB0EV4623MTPVCV5F1HNXW
Run Details
Model:
DeepSeek V4 Flash 0731 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3m 51s
Cost:
$0.001211
Provider:
CoreWeave
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The old attic clock struck twelve as rain lashed the gables, and below the dark house lay silent and still. A body lay sprawled upon the study floor, its sightless eyes fixed on the ceiling above, unmoving and utterly alone. The inspector knelt beside the corpse, noting the faint scent of almonds on the still air with a gloved finger. A silver locket lay clutched in the victim’s hand, its chain snapped as if torn free in a desperate struggle. Footsteps echoed from the hall outside, heavy and slow, then the study door suddenly creaked open with a low groan. Inspector Marlowe turned, his eyes narrowing as he saw who stood trembling in the doorway at the threshold there now.
created_at
"2026-09-03T09:53:40.722Z"
9/3/2026, 9:53:40 AM
model
"deepseek/deepseek-v4-flash-20260731"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1925
moderation_latency
(null)
generation_time
231089
tokens_prompt
46
tokens_completion
4047
native_tokens_prompt
118
native_tokens_completion
4270
native_tokens_completion_images
(null)
native_tokens_reasoning
3876
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
0.00121094
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788429220-gQuOgm6sm1lkNDnJSWl5"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788429220-roNT7uNQ2N3V1F7jCljk"
upstream_id
"chatcmpl-671d127b-0bca-47c7-9221-744f7268d03b"
provider_responses
0
endpoint_id
"47a93b18-a9c6-485b-9a47-2afb6ca790dc"
is_byok
false
latency
44
model_permaslug
"deepseek/deepseek-v4-flash-20260731"
provider_name
"BaseTen"
status
429
1
endpoint_id
"cbfecbd7-9a18-45ea-bcd1-fabaa868db5c"
id
"chatcmpl-671d127b-0bca-47c7-9221-744f7268d03b"
is_byok
false
latency
682
model_permaslug
"deepseek/deepseek-v4-flash-20260731"
provider_name
"CoreWeave"
status
200
total_cost
0.00121094
cache_discount
(null)
upstream_inference_cost
0
provider_name
"CoreWeave"
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20