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Run: 2026-09-03-01M1KBH2CD28723P2EJABCTRNR
Run Details
Model:
DeepSeek V4 Flash 0731 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
12.0s
Cost:
$0.001040
Provider:
StreamLake
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 cold November rain hammered the ancient slate rooftops of Blackwater while the old church clock struck precisely nine sharp. Inside the manor, Lady Ashworth lay motionless on the Persian rug, her emerald gown now soaked a dark deep crimson. A single candelabra flickered on the marble mantle, casting monstrous twisting shadows across the high blood-spattered walls and low ceiling. The elderly butler stood deathly pale at the doorway, his white gloves trembling and his eyes fixed still upon her. Outside, a black carriage clattered to a sudden halt, and the inspector's heavy boots splashed through the muddy wet lane. He paused at the rusted iron gate, noting the single fresh footprint beside the gardener's forgotten trowel and small rake. No one had reported the murder yet, but the bright blood on the window pane told its own silent story.
created_at
"2026-09-03T10:02:45.028Z"
9/3/2026, 10:02:45 AM
model
"deepseek/deepseek-v4-flash-20260731"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1115
moderation_latency
(null)
generation_time
11886
tokens_prompt
46
tokens_completion
2389
native_tokens_prompt
118
native_tokens_completion
2587
native_tokens_completion_images
(null)
native_tokens_reasoning
2404
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
0.001040028
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788429765-EDEkmJsDF2QdSXnw6Cp1"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788429765-aThyHjgNcAYsRwTpznR3"
upstream_id
"req-c3iz3u-1788429765244754706"
provider_responses
0
endpoint_id
"d880a270-04ff-479c-b312-6246c0f985b0"
id
"req-c3iz3u-1788429765244754706"
is_byok
false
latency
1115
model_permaslug
"deepseek/deepseek-v4-flash-20260731"
provider_name
"StreamLake"
status
200
total_cost
0.001040028
cache_discount
(null)
upstream_inference_cost
0
provider_name
"StreamLake"
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