Run: 2026-09-10-01M25DX60TKK3CJFEY80A0ZWNS

Run Details

Duration:
16.8s
Cost:
$0.002698
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
87.50% 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 rain hammered the window while Detective Mara Voss silently stared at the dead body slumped across the marble floor. A crimson stain spread beneath the victim's chair, and now the silent grandfather clock had stopped at midnight exactly forever. Mara carefully knelt beside him, still noting the broken wine glass nearby and the faint perfume of deadly bitter almonds. The room immediately smelled of very stale wealth, oddly dusty old books, and something dangerous she could not quite name. On the oak desk, a half-empty glass of dark red wine still sat beside a single hastily crumpled note nearby. Mara alone once quietly read the single cryptic note: 'Meet me at midnight, or the cold truth dies with me.' She quickly looked toward the dark doorway, where only a silent shadow had apparently vanished just before her own arrival. Outside, distant thunder rolled loudly, and somewhere in the old mansion a single wooden floorboard creaked under unseen careful footsteps. Mara slowly drew her weapon, very certain the killer was still inside, now watching, waiting, and ready to strike again.
created_at"2026-09-10T10:30:38.879Z" 9/10/2026, 10:30:38 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency805
moderation_latency(null)
generation_time16745
tokens_prompt46
tokens_completion4368
native_tokens_prompt65
native_tokens_completion4481
native_tokens_completion_images(null)
native_tokens_reasoning4269
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)
usage0.00269835
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789036238-jIUdtZW8ctQtfDLi67t8"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789036238-3vVLWn6hVaIlj07C10D1"
upstream_id"457a32b0-eded-427c-8695-10eed1ea066a"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"457a32b0-eded-427c-8695-10eed1ea066a"
is_byokfalse
latency326
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00269835
cache_discount(null)
upstream_inference_cost0
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
87.50% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
540
620
720