Run: 2026-07-09-01KX41FECY3ZSPH0F0VHTQHC15

Run Details

Duration:
11.7s
Cost:
$0.007457
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 stitched silver lines across Blackthorn Manor, while Inspector Vale watched the library window glow beneath the midnight storm outside. Inside, someone had arranged three wineglasses beside the corpse, though only two guests remained awake downstairs in the house tonight. Vale entered cautiously, silently noticing muddy footprints circling the body before disappearing beneath an antique Persian rug near the fireplace. The dead man clutched a torn playing card, its missing corner matching fragments discovered inside Vale's coat pocket earlier tonight. Behind him, the manor doors slammed shut, and every candle extinguished simultaneously, leaving one whispered accusation hanging in darkness alone. “You should not have returned,” murmured a voice from the corridor, using the exact phrase found beneath the victim's fingernails. Vale turned, but the corridor stood empty, except for a fresh red handprint pressed against the wallpaper directly behind him. On its palm, someone had drawn a tiny black star, the private symbol of the person who murdered Vale's brother.
created_at"2026-07-09T18:15:42.253Z" 7/9/2026, 6:15:42 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2291
moderation_latency(null)
generation_time11604
tokens_prompt46
tokens_completion672
native_tokens_prompt41
native_tokens_completion1236
native_tokens_completion_images0
native_tokens_reasoning1034
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"
usage0.007457
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0fcebd3e35cccb46016a4fe54e603c8197a5705d9029ea17a7"
is_byokfalse
latency294
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-1783620942-XuccTOwvVTy7nyZfzLno"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620942-vhl0xnHMKJFZbdwPHaj7"
upstream_id"resp_0fcebd3e35cccb46016a4fe54e603c8197a5705d9029ea17a7"
total_cost0.007457
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