Run: 2026-04-25-01KQ2EQ4VV5HFMWFHP5ZZB80FJ

Run Details

Duration:
1m 46s
Cost:
$0.004012
Provider:
DeepSeek

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 old Victorian house stood silent beneath a moonless, starless sky, its dark windows like empty eye sockets, watching silently. Detective Inspector Graves stepped out of the black sedan, pulling his trench coat tighter against the biting, relentless winter wind. A young uniformed officer met him at the sagging gate, her flashlight beam cutting through the oppressive, damp, clinging darkness. She silently led him up the weed-choked gravel path, past overgrown rose bushes that clawed angrily at their thick clothing. The massive front door stood slightly ajar, revealing a thin sliver of flickering candlelight from the grand, silent hallway beyond. A body lay crumpled at the foot of the grand staircase, one pale arm outstretched toward a fallen silver candlestick. A deep pool of dark blood spread slowly across the black and white checkered marble floor beneath her still form.
created_at"2026-04-25T13:54:33.376Z" 4/25/2026, 1:54:33 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency475
moderation_latency(null)
generation_time98777
tokens_prompt46
tokens_completion3863
native_tokens_prompt39
native_tokens_completion4592
native_tokens_completion_images(null)
native_tokens_reasoning4415
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"
usage0.004012005
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"dc77e6fd-527e-4a06-b2fb-398865f3a90c"
is_byokfalse
latency32
model_permaslug"deepseek/deepseek-v4-pro-20260423"
provider_name"DeepSeek"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777125273-wjOCLBMmxdrhAkHZQZ9r"
session_id(null)
api_type"completions"
id"gen-1777125273-IagWiEBmwvew0Kq7BOkB"
upstream_id"dc77e6fd-527e-4a06-b2fb-398865f3a90c"
total_cost0.004012005
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620