Run: 2026-07-09-01KX40C6BMSMSB5S5MGP2CRSYT

Run Details

Duration:
1.5s
Cost:
$0.000689
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
90.28% 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 whispered softly while Detective Vale entered the shuttered museum alone. Moonlight revealed crimson footprints crossing the marble floor toward darkness. A broken clock ticked thirteen, though midnight had passed hours earlier. Near the staircase, curator Bell lay beneath portraits of forgotten kings. His clenched hand held one silver button, polished and unfamiliar. Vale knelt carefully, hearing footsteps echo behind the locked entrance. Then every museum light flickered, revealing someone standing beside Bell. The stranger smiled, raised one finger, and vanished behind shadows.
created_at"2026-07-09T17:56:27.132Z" 7/9/2026, 5:56:27 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency490
moderation_latency(null)
generation_time1361
tokens_prompt46
tokens_completion161
native_tokens_prompt41
native_tokens_completion108
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.000689
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0d8df1f9fea8c145016a4fe0cb35e881969fc16e59784222cc"
is_byokfalse
latency287
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-1783619787-jkDcncKnqnIrIhV4zyRF"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619787-B6F6Il9MfwKTyfAWlbYC"
upstream_id"resp_0d8df1f9fea8c145016a4fe0cb35e881969fc16e59784222cc"
total_cost0.000689
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
90.28% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
011
110
211
311
410
510
610
710