Run: 2026-07-09-01KX40ZDD7FYR44P2X7813E609

Run Details

Duration:
1.4s
Cost:
$0.000767
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
8.56% 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 corpse beneath the library’s grand clock, its hands stopped precisely at twelve. Rain lashed the windows while seven guests gathered silently, each concealing secrets behind expressions carefully schooled into innocence. Vale noticed a silver thread clutched tightly in the victim’s fingers, glimmering beneath the chandelier’s trembling light overhead. Nobody spoke until the clock chimed once, though its mechanism had remained broken for nearly three years. Then, from upstairs, someone screamed Vale’s name, and every suspect turned toward the staircase with identical terror.
created_at"2026-07-09T18:06:56.942Z" 7/9/2026, 6:06:56 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency405
moderation_latency(null)
generation_time1237
tokens_prompt46
tokens_completion164
native_tokens_prompt41
native_tokens_completion121
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"
usage0.000767
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0dc7be8513228626016a4fe3410c408195976e2ad2a70cd349"
is_byokfalse
latency254
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-1783620416-7VLV6bWvpbGOh2fNjjIm"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620416-zdgJ5qSXMKuzLaEUl94X"
upstream_id"resp_0dc7be8513228626016a4fe3410c408195976e2ad2a70cd349"
total_cost0.000767
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
8.56% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
018
118
218
317
417