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Run: 2026-09-10-01M25DZV22V006TXB4KB4872KA
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
18.4s
Cost:
$0.002933
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
Rain hammered the mansion windows while Detective Mara Vale stepped through the grand front door, with her soaked coat dripping. A butler with pallid cheeks led her toward the library where the master lay dead beneath a crimson velvet throw. The victim's glassy eyes stared at the ceiling, and a silver letter opener pierced his chest deeply, without any doubt. Mara knelt beside him, noting the faint perfume of lilies and the overturned brandy glass near his pale right hand. The butler claimed he heard nothing, yet mud caked his shoes and his hands trembled when she asked about dinner. A storm sealed every road, trapping everyone inside with a killer among them, waiting for a perfect moment to strike. Mara looked at the locked window, then whispered that the murderer never left this room tonight and she smiled coldly. Outside, thunder cracked as the lights died, leaving Mara alone with a corpse and a liar in the sudden dark.
created_at
"2026-09-10T10:32:05.958Z"
9/10/2026, 10:32:05 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
720
moderation_latency
(null)
generation_time
18319
tokens_prompt
46
tokens_completion
4945
native_tokens_prompt
65
native_tokens_completion
4872
native_tokens_completion_images
(null)
native_tokens_reasoning
4680
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
0.00293295
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789036325-IxNBATXskliHDhT8bsj3"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789036325-vktTCBhBK70qFhBUvskI"
upstream_id
"16de8152-acdc-455b-bce1-8c17694a0865"
provider_responses
0
endpoint_id
"fd104bc8-535a-4d31-a847-a8e402e86a02"
id
"16de8152-acdc-455b-bce1-8c17694a0865"
is_byok
false
latency
341
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepSeek"
status
200
total_cost
0.00293295
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
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20