Run: 2026-09-10-01M25DY8RQK230H21D54EVYBVF

Run Details

Duration:
16.0s
Cost:
$0.002736
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
Rain hammered the cracked window as Detective Mara Voss quietly stepped alone into the abandoned lighthouse at very cold midnight. A dead body lay beneath the spiral staircase, its hand clutching a brass key near shattered glass and old blood. Mara knelt beside the victim, noticing a silver locket, wet footprints, and a strange symbol deeply carved into old floorboards. The locket opened with a soft click, revealing a tiny photograph of the mayor's missing daughter from twelve years ago. Outside, waves crashed against jagged rocks while a distant foghorn moaned through the haunted stormy darkness like a wounded animal. Mara heard footsteps above her, slow and deliberate, followed by the creak of an opening door somewhere in the lighthouse. She drew her weapon, rising carefully, her eyes fixed on the shadow moving across the ceiling above the old stairs. Then the lights died, plunging the lighthouse into very cold blackness, and a voice softly whispered her name from below. Mara turned toward the sound, knowing the killer had been patiently waiting for her all along in the dark shadows. The first shot suddenly rang out before she could even scream, and the dark mystery ended before it truly began.
created_at"2026-09-10T10:31:14.459Z" 9/10/2026, 10:31:14 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency494
moderation_latency(null)
generation_time15920
tokens_prompt46
tokens_completion4417
native_tokens_prompt65
native_tokens_completion4544
native_tokens_completion_images(null)
native_tokens_reasoning4306
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)
usage0.00273615
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789036274-iCAUfmOp5ZzhLsq2v2PH"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789036274-vLyGTGSRPGk7pBGmGL7w"
upstream_id"1226586a-0d20-4e35-bccc-4c8e02b09954"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"1226586a-0d20-4e35-bccc-4c8e02b09954"
is_byokfalse
latency336
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00273615
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
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920