Run: 2026-07-09-01KX40D8CN2SER7G3V5YJN2SA2

Run Details

Duration:
1.3s
Cost:
$0.000743
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
22.96% 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, Inspector Vale discovered a bloodless corpse beneath the ballroom chandelier, clutching a single black rose tightly. Outside, rain stitched silver curtains across windows while every locked door guarded secrets no living guest dared confess aloud. The victim's pocket watch had stopped at eleven thirteen, precisely when the orchestra played its final, discordant waltz. Vale studied twelve silent faces, noticing one guest smiled nervously, while another carefully concealed mud beneath polished shoes. Then the chandelier flickered twice, and someone whispered the murderer remained inside, listening patiently among them that night.
created_at"2026-07-09T17:57:01.983Z" 7/9/2026, 5:57:01 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency307
moderation_latency(null)
generation_time1148
tokens_prompt46
tokens_completion169
native_tokens_prompt41
native_tokens_completion117
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"
usage0.000743
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0ca4dbda21c8c413016a4fe0ee0c188193b8098ffe83348243"
is_byokfalse
latency176
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-1783619821-DIC845LVAdrKuiXAnGI8"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619821-XcyzZnz05o7OHEuiAPy9"
upstream_id"resp_0ca4dbda21c8c413016a4fe0ee0c188193b8098ffe83348243"
total_cost0.000743
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
22.96% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
018
119
218
318
418