Run: 2026-07-09-01KX40EA0J29K94AGD7Z22Z5GZ

Run Details

Duration:
1.1s
Cost:
$0.000629
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
46.93% 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 entered the library, where Professor Armitage lay dead beside a shattered clock and unopened window. Rain tapped against the stained glass while three guests gathered silently, each guarding secrets more dangerous than the storm outside. Vale noticed crimson fingerprints circling the teacup, though everyone insisted nobody had touched it since dinner had ended. Then the grandfather clock struck thirteen, and somewhere behind the bookshelves, someone began laughing softly in the darkness.
created_at"2026-07-09T17:57:36.409Z" 7/9/2026, 5:57:36 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency344
moderation_latency(null)
generation_time1007
tokens_prompt46
tokens_completion134
native_tokens_prompt41
native_tokens_completion98
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"
usage0.000629
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0630765751f779ad016a4fe1107ba081948088c2950ffa7171"
is_byokfalse
latency207
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-1783619856-GOOPZIuFU313Kyct5KB5"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619856-y5k1Jodl88JEgZtvT0rN"
upstream_id"resp_0630765751f779ad016a4fe1107ba081948088c2950ffa7171"
total_cost0.000629
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
46.93% Matches word count n/a
neededCleanfalse
sentences4
wordCounts
019
120
218
318