Run: 2026-07-09-01KX41KKN17VQ9XB5HNFN6QCBH

Run Details

Duration:
6.3s
Cost:
$0.007247
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 silvered the courthouse steps when Detective Mara Vale arrived. Inside, one dead judge waited beneath a shattered courthouse clock. His right hand tightly gripped a small bloodstained brass key. Three witnesses claimed they heard nothing before midnight that night. Yet muddy footprints crossed the floor, stopping beside Mara's boots. She recognized the key, though nobody else understood its meaning. A folded note rested beneath the judge's cold, lifeless tongue. On it, someone had carefully written Mara's childhood nickname twice. Then the courthouse bell rang thirteen times, though broken outside. Mara locked the doors and questioned everyone inside before dawn. Someone smiled when she mentioned the missing thirteenth witness aloud. That smile belonged to the judge's supposedly grieving widow upstairs.
created_at"2026-07-09T18:17:58.698Z" 7/9/2026, 6:17:58 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5718
moderation_latency(null)
generation_time6034
tokens_prompt46
tokens_completion219
native_tokens_prompt41
native_tokens_completion1201
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"
usage0.007247
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0840341e11d03111016a4fe5d74bc081978f905225d0df0d3d"
is_byokfalse
latency775
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-1783621078-LBeywp7IKdLsqKoELSgv"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783621078-73WnpXZR6CVpRXMPetvB"
upstream_id"resp_0840341e11d03111016a4fe5d74bc081978f905225d0df0d3d"
total_cost0.007247
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