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Run: 2026-04-25-01KQ2EQ4VV5HFMWFHP5ZZB80FJ
Run Details
Model:
DeepSeek V4 Pro (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1m 46s
Cost:
$0.004012
Provider:
DeepSeek
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 Victorian house stood silent beneath a moonless, starless sky, its dark windows like empty eye sockets, watching silently. Detective Inspector Graves stepped out of the black sedan, pulling his trench coat tighter against the biting, relentless winter wind. A young uniformed officer met him at the sagging gate, her flashlight beam cutting through the oppressive, damp, clinging darkness. She silently led him up the weed-choked gravel path, past overgrown rose bushes that clawed angrily at their thick clothing. The massive front door stood slightly ajar, revealing a thin sliver of flickering candlelight from the grand, silent hallway beyond. A body lay crumpled at the foot of the grand staircase, one pale arm outstretched toward a fallen silver candlestick. A deep pool of dark blood spread slowly across the black and white checkered marble floor beneath her still form.
created_at
"2026-04-25T13:54:33.376Z"
4/25/2026, 1:54:33 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
475
moderation_latency
(null)
generation_time
98777
tokens_prompt
46
tokens_completion
3863
native_tokens_prompt
39
native_tokens_completion
4592
native_tokens_completion_images
(null)
native_tokens_reasoning
4415
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
0.004012005
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"dc77e6fd-527e-4a06-b2fb-398865f3a90c"
is_byok
false
latency
32
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-1777125273-wjOCLBMmxdrhAkHZQZ9r"
session_id
(null)
api_type
"completions"
id
"gen-1777125273-IagWiEBmwvew0Kq7BOkB"
upstream_id
"dc77e6fd-527e-4a06-b2fb-398865f3a90c"
total_cost
0.004012005
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20