Run: 2026-07-09-01KX41HZD8N52H5FAQEAV6M4X9

Run Details

Duration:
7.6s
Cost:
$0.009089
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 Vale found the mayor's body beneath the conservatory's shattered glass, surrounded by unnaturally blooming crimson roses. Her lantern revealed a silver cufflink clenched inside his fist, bearing the initials of someone officially declared dead last winter. Beyond the locked doors, rain hammered the windows while an unseen violin played the mayor's favorite waltz downstairs without pause. Mara noticed muddy footprints crossing the marble floor, yet every print pointed toward the body instead of away from it. The housekeeper arrived breathless, claiming she had heard three gunshots, though the revolver beside him contained only two bullets remaining. Then the grandfather clock struck thirteen, and every candle in the conservatory extinguished simultaneously, leaving Mara alone with impossible evidence. From the darkness, someone whispered her childhood nickname, a name known only to Mara and the murdered mayor until tonight. She raised her pistol, but the voice laughed softly, promising that this first death had merely opened something far worse.
created_at"2026-07-09T18:17:05.201Z" 7/9/2026, 6:17:05 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2201
moderation_latency(null)
generation_time7034
tokens_prompt46
tokens_completion565
native_tokens_prompt41
native_tokens_completion1508
native_tokens_completion_images0
native_tokens_reasoning1304
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"
usage0.009089
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0a669d90e9f0b182016a4fe5a149bc8197be0c6a8128e5c2e2"
is_byokfalse
latency208
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-1783621025-R8GrKcFPoOZWf0JNnyVV"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783621025-WRBAmgzWHJTzNtN9zHnE"
upstream_id"resp_0a669d90e9f0b182016a4fe5a149bc8197be0c6a8128e5c2e2"
total_cost0.009089
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