Run: 2026-07-09-01KX40RA2S6NNFDGZA5KWN91PD

Run Details

Duration:
6.6s
Cost:
$0.008135
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
Rain polished the courthouse windows while Detective Mara Voss discovered a dead judge beneath the courthouse portrait depicting blindfolded Justice. His silver gavel rested inside his mouth, and three unfamiliar keys glittered beside one bloodless, outstretched hand, nearby gleaming coldly. No window stood open, yet muddy footprints crossed the chamber, ending abruptly beneath the judge’s locked mahogany desk without explanation. Mara crouched, noticing every print pointed inward, as though the killer had entered from nowhere and vanished into silence again. Behind her, courthouse guards argued softly about missing cameras, while a telephone rang unanswered inside the judge’s coat pocket twice. Then the dead man’s fingers twitched, revealing a narrow strip of paper bearing Mara’s own childhood nickname in faded ink. She read the message once, then looked toward the sealed archives, where someone began turning pages behind the steel door. The guards heard nothing, but Mara heard a whisper through the keyhole: “You promised never to return alive, Detective Voss.”
created_at"2026-07-09T18:03:04.162Z" 7/9/2026, 6:03:04 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6046
moderation_latency(null)
generation_time6325
tokens_prompt46
tokens_completion287
native_tokens_prompt41
native_tokens_completion1349
native_tokens_completion_images0
native_tokens_reasoning1139
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"
usage0.008135
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_075bf34a378e3afb016a4fe2583aec8195b98bc364a4b1f714"
is_byokfalse
latency188
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-1783620184-D1e8DdNaTq2tBj0SNkU1"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620184-CrP9mJCr2YPbluptnnLj"
upstream_id"resp_075bf34a378e3afb016a4fe2583aec8195b98bc364a4b1f714"
total_cost0.008135
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

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