Run: 2026-07-09-01KX414HBZRT84396NBC6Y9YBV

Run Details

Duration:
11.1s
Cost:
$0.005861
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain veiled Blackthorn Manor when Inspector Vale arrived before dawn. Inside, the library door stood open, though nobody claimed entering. Lord Ashcombe lay beside the fireplace, one hand clenched tightly. Beside him, a silver music box played one unfinished melody. Vale noticed muddy footprints ending beneath the victim's writing desk. Every window was locked, and frost sealed each outer latch. His daughter arrived breathless, insisting she discovered nothing unusual inside. Then the clock struck thirteen, silencing everyone in the hallway. Vale looked toward the portrait, whose eyes seemed freshly wet. Behind its frame, someone had hidden a bloodstained glove overnight. The glove bore Ashcombe's initials, but the blood belonged elsewhere. Vale smiled quietly, realizing the murderer remained inside the manor.
created_at"2026-07-09T18:09:44.839Z" 7/9/2026, 6:09:44 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2240
moderation_latency(null)
generation_time10860
tokens_prompt46
tokens_completion781
native_tokens_prompt41
native_tokens_completion970
native_tokens_completion_images0
native_tokens_reasoning798
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"
usage0.005861
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0128f4a141196711016a4fe3e8e9348196864a24471c73e0fe"
is_byokfalse
latency272
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-1783620584-HJWbkJw6rq87qasUlo9J"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620584-8F8UZi5iZuzR0MtnYBnc"
upstream_id"resp_0128f4a141196711016a4fe3e8e9348196864a24471c73e0fe"
total_cost0.005861
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
sentences12
wordCounts
010
110
210
310
410
510
610
710
810
910
1010
1110