Run: 2026-07-09-01KX40Z3QQDZN32G4RZZ82BM6F

Run Details

Duration:
1.1s
Cost:
$0.000623
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
22.21% 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
Rain polished the courthouse windows while Detective Mara Venn discovered a corpse beneath the judge's bench before dawn. The dead man wore a silver mask, clenched around a bloodstained key, and carried no identification whatsoever. Behind Mara, the locked courtroom doors groaned open, though every guard swore nobody touched them throughout the night. On the jury box, someone had written her name repeatedly in wet crimson letters beneath the phrase, “Ask again.”
created_at"2026-07-09T18:06:47.039Z" 7/9/2026, 6:06:47 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency334
moderation_latency(null)
generation_time988
tokens_prompt46
tokens_completion122
native_tokens_prompt41
native_tokens_completion97
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"
usage0.000623
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_015ec6b4afafe6e2016a4fe33719088190996c80eb8ada2d8b"
is_byokfalse
latency183
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-1783620407-w0XzSaegLZ8uEN8Yg8lk"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620407-XehxCvbjnqEcVsbAYV0Y"
upstream_id"resp_015ec6b4afafe6e2016a4fe33719088190996c80eb8ada2d8b"
total_cost0.000623
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
22.21% Matches word count n/a
neededCleanfalse
sentences4
wordCounts
018
117
218
319