Run: 2026-10-27-01M5YJEPPA5F15QMDJZBGC0ZDT

Run Details

Duration:
13.2s
Cost:
$0.005446
Provider:
OpenAI

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 fog arrived before dawn, swallowing the harbor and leaving the lighthouse keeper’s cottage stranded above a sea of white. At seven, Detective Mara Voss climbed the path, following a boy who refused to look back at the silent house. Inside, the keeper lay beneath the kitchen table, his throat cut neatly, one hand still clutching a tarnished silver key. The kettle whistled on the stove, though the doctor later insisted the dead man had been cold for several hours. Mara turned off the flame and noticed four cups on the counter, three clean and one stained dark with lipstick. The boy said his father never entertained visitors, and his mother had drowned during the winter storm twelve years earlier. Then someone knocked from inside the locked pantry, softly at first, before the sound became a desperate, uneven little rhythm. Mara took the key from the dead man’s fingers, while the boy whispered that nobody had entered their cottage overnight. The key turned easily, but the pantry stood empty, except for a photograph pinned to the wall with a knife. In the photograph, Mara recognized herself, standing beside the keeper’s wife on the morning both women were supposed to die.
created_at"2026-10-27T11:38:14.039Z" 10/27/2026, 11:38:14 AM
model"openai/gpt-6.1-terra-20261026"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4519
moderation_latency(null)
generation_time12660
tokens_prompt46
tokens_completion691
native_tokens_prompt41
native_tokens_completion1081
native_tokens_completion_images0
native_tokens_reasoning838
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"completed"
service_tier"default"
usage0.005446
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer(null)
request_id"req-1793101094-R0uJpbhretWKaTDTI1em"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1793101094-K7gAP2a3L4AZ1ZFra6oS"
upstream_id"resp_01686e0be2aa4934016ae08d26236c87d1aaa113c83729060e"
provider_responses
0
endpoint_id"2d2ad10f-098e-4bbf-aa95-11f705b2b9a2"
id"resp_01686e0be2aa4934016ae08d26236c87d1aaa113c83729060e"
is_byokfalse
latency350
model_permaslug"openai/gpt-6.1-terra-20261026"
provider_name"OpenAI"
status200
total_cost0.005446
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
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