Run: 2026-09-23-01M36P5FWN970H4PE1HPTAJC9K

Run Details

Duration:
18.7s
Cost:
$0.001017
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
At midnight, Detective Mara Venn found the library door ajar, though the storm had sealed every window against the rain. Inside, a grandfather clock had stopped at eleven, and someone had arranged its hands into a trembling accusation of murder. Lord Ashcombe lay beside the desk, one gloved hand clutching a wet match and the other pointing toward empty shelves. No blood stained the carpet, but a red fingerprint marked the portrait of Ashcombe’s ancestor, whose eyes seemed newly wet. Mara recognized the match from the conservatory, where every candle had been deliberately extinguished before the guests arrived for dinner. Then the butler whispered that only six people possessed keys, and five were gathered downstairs awaiting questions from Detective Venn. From beneath the desk, a telephone rang once, although its disconnected wire curled across the floor like a blackened vein. Mara lifted the receiver and heard her own voice whisper, “You’re late,” as the dead man’s lips began moving silently.
created_at"2026-09-23T08:29:55.995Z" 9/23/2026, 8:29:55 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7505
moderation_latency(null)
generation_time18419
tokens_prompt46
tokens_completion369
native_tokens_prompt41
native_tokens_completion2025
native_tokens_completion_images0
native_tokens_reasoning1821
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"
usage0.0010166
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790152195-LOGsO5TKbolcG3OF0wu7"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790152195-BUsnooJC1dibm5YwPHUj"
upstream_id"resp_0910edf163e5f4d6016ab38e04139087d19252da61fd5b813c"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0910edf163e5f4d6016ab38e04139087d19252da61fd5b813c"
is_byokfalse
latency1182
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0010166
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
sentences8
wordCounts
020
120
220
320
420
520
620
720