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Run: 2026-09-10-01M25DTC6416M7KP72YW5DRK9A
Run Details
Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1m 44s
Cost:
$0.004774
Provider:
DeepInfra
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 windows of Blackthorn Manor just as Detective Mara Voss stepped into the silent, candlelit, grand old foyer. A dead man lay sprawled across the marble floor with a bloody silver letter opener buried deep in his chest. Detective Voss knelt beside him while sudden thunder shook the chandelier and dark shadows danced along the paneled oak walls. The victim's eyes were open wide, and his pale lips seemed frozen around a single final, unfinished, desperate last word. No weapon glinted nearby, no footprints marked the carpet, and no obvious suspect stood waiting visibly in the dark gloom. Only a grandfather clock ticked softly in the hallway, counting seconds that felt heavier than the distant angry storm outside. Detective Voss whispered, "Whoever did this is still inside Blackthorn Manor tonight, and they already know I have now arrived."
created_at
"2026-09-10T10:29:06.888Z"
9/10/2026, 10:29:06 AM
model
"deepseek/deepseek-v4.1-flash-20260910"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
602
moderation_latency
(null)
generation_time
103530
tokens_prompt
46
tokens_completion
3950
native_tokens_prompt
65
native_tokens_completion
3962
native_tokens_completion_images
(null)
native_tokens_reasoning
3784
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
0.0047739
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1789036146-SjPy4D1AepZo7FtSryF5"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1789036146-6ntvdBfG3zxYERVz509v"
upstream_id
"chatcmpl-RZG80dmTnDqlLQgO67GHdLHj"
provider_responses
0
endpoint_id
"519706ce-5bef-4de6-a755-71cc3c3ac632"
id
"chatcmpl-RZG80dmTnDqlLQgO67GHdLHj"
is_byok
false
latency
75
model_permaslug
"deepseek/deepseek-v4.1-flash-20260910"
provider_name
"DeepInfra"
status
200
total_cost
0.0047739
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepInfra"
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20