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Run: 2026-04-25-01KQ2GS6GTH244AW6QNMHJC1BN
Run Details
Model:
DeepSeek V4 Flash
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.0s
Cost:
$0.000053
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
1.70%
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 rain slicked cobblestones gleamed under a single, sputtering gaslamp’s amber glow. A crumpled velvet glove lay near the wrought-iron gate, its fingers pointing toward the house. Dr. Alistair Finch paused, his umbrella dripping a steady rhythm onto his polished leather shoes. The front door stood slightly ajar, whispering a silent invitation into the darkened foyer within. Inside, a grandfather clock struck eleven, its chime swallowed by the thick, musty air. On the Persian rug, a spilled inkwell had formed a black, spreading pool like a wound. He stepped forward, and the floorboard creaked, a sharp protest beneath his careful weight. Then he saw her—a figure slumped in the high-backed chair, a crimson stain blooming across her gown.
created_at
"2026-04-25T14:30:30.686Z"
4/25/2026, 2:30:30 PM
model
"deepseek/deepseek-v4-flash-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
533
moderation_latency
(null)
generation_time
2938
tokens_prompt
46
tokens_completion
197
native_tokens_prompt
39
native_tokens_completion
170
native_tokens_completion_images
(null)
native_tokens_reasoning
0
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
0.00005306
router
(null)
provider_responses
0
endpoint_id
"722e0746-2034-4d6e-a08f-e6271849ee9e"
id
"5694462b-d350-49aa-aa6b-eb8117d03df0"
is_byok
false
latency
273
model_permaslug
"deepseek/deepseek-v4-flash-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-1777127430-WyIbDZpIrSCxtm5G1MIs"
session_id
(null)
api_type
"completions"
id
"gen-1777127430-p0mF5Qbd6xeMpXW4KiCT"
upstream_id
"5694462b-d350-49aa-aa6b-eb8117d03df0"
total_cost
0.00005306
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
1.70%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
12
1
15
2
15
3
15
4
14
5
16
6
14
7
18