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Run: 2026-09-03-01M1KBM76KHX51PEEDPDJ85RK7
Run Details
Model:
DeepSeek V4 Pro 0813 (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
38.4s
Cost:
$0.011167
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 morning fog clung to the cobblestones like a guilty secret refusing to be confessed aloud in the dim light. Detective Eleanor Voss pulled her wool coat tighter and studied the body slumped near the old stone fountain's quiet basin. A single crimson glove lay beside the victim's outstretched hand, its fingers curled inward as if grasping something still unseen. Voss knelt on the damp stones, her knees protesting the cold, and examined the glove without touching its worn leather. The victim's face was turned toward the gray sky, and a small silver key rested just beneath his parted lips. She glanced at the constable standing by the fountain's edge, whose notebook was already damp with the morning's slow drizzle. "Nobody touches that key until the photographer arrives," Voss said, her breath curling in the frigid air like thin smoke. The constable nodded, then pointed a trembling finger toward the narrow alley where a dark figure had vanished moments before. Voss rose slowly, her eyes fixed on the alley's black mouth, and felt the first cold thread of suspicion tighten. Whoever had killed the man by the fountain had left behind a key, a glove, and a strange, deliberate silence.
created_at
"2026-09-03T10:04:28.259Z"
9/3/2026, 10:04:28 AM
model
"deepseek/deepseek-v4-pro-20260813"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1348
moderation_latency
(null)
generation_time
38350
tokens_prompt
46
tokens_completion
3416
native_tokens_prompt
118
native_tokens_completion
3298
native_tokens_completion_images
(null)
native_tokens_reasoning
3057
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
0.011167384
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788429868-67BfljvRYnVUQnMDIlk7"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788429868-2iB1SIgDOOIdKBqM8t9c"
upstream_id
"req-q73a0r-1788429868538096261"
provider_responses
0
endpoint_id
"072c1c23-c069-4242-bb6d-1b30ca5f4eb8"
id
"req-q73a0r-1788429868538096261"
is_byok
false
latency
1348
model_permaslug
"deepseek/deepseek-v4-pro-20260813"
provider_name
"StreamLake"
status
200
total_cost
0.011167384
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20