Run: 2026-07-09-01KX40G5NR3XVSD692CVDMZXPP

Run Details

Duration:
1.5s
Cost:
$0.000977
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
13.01% 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 polished the cobblestones outside Blackthorn Manor, while Inspector Vale studied footprints dissolving beneath the midnight storm. Inside, a grandfather clock had stopped at twelve, though every witness swore it chimed thirteen times. Lady Ashcombe lay beside the library hearth, clutching a torn playing card and wearing someone else’s emerald ring. Inspector Vale noticed fresh mud beneath the locked window, then quietly asked which guest had arrived without an umbrella. No one answered immediately; instead, the butler dropped a silver tray, revealing blood beneath its polished underside. From the staircase, young Clara whispered that the murderer still hid upstairs, listening patiently to every frightened breath. Vale looked toward the dark landing, where a single candle flickered, though nobody stood anywhere near it.
created_at"2026-07-09T17:58:37.503Z" 7/9/2026, 5:58:37 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency347
moderation_latency(null)
generation_time1328
tokens_prompt46
tokens_completion220
native_tokens_prompt41
native_tokens_completion156
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.000977
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_04f09eedbceb0596016a4fe14d925c819086b89787a4a3ad80"
is_byokfalse
latency204
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783619917-PtAhv0DuxCFawtMNK4jq"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619917-KvKmc8GfLzxowsZ1ruQD"
upstream_id"resp_04f09eedbceb0596016a4fe14d925c819086b89787a4a3ad80"
total_cost0.000977
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
13.01% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
017
116
218
319
417
518
617