Run: 2026-09-03-01M1KBM76KHX51PEEDPDJ85RK7

Run Details

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

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_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1348
moderation_latency(null)
generation_time38350
tokens_prompt46
tokens_completion3416
native_tokens_prompt118
native_tokens_completion3298
native_tokens_completion_images(null)
native_tokens_reasoning3057
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
service_tier(null)
usage0.011167384
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
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endpoint_id"072c1c23-c069-4242-bb6d-1b30ca5f4eb8"
id"req-q73a0r-1788429868538096261"
is_byokfalse
latency1348
model_permaslug"deepseek/deepseek-v4-pro-20260813"
provider_name"StreamLake"
status200
total_cost0.011167384
cache_discount(null)
upstream_inference_cost0
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
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920