Run: 2026-07-09-01KX418G56NN1BCKHEZ857FXXV

Run Details

Duration:
6.4s
Cost:
$0.007199
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
At midnight, Inspector Vale found Lady Ashcombe beneath the library window, her silver mask reflecting the moonlit garden beyond silently. Her right hand gripped a torn playing card, while the locked door behind him whispered of impossible escape and betrayal. Vale knelt, noticing three muddy footprints leading inward, though rain had soaked every path outside the mansion before dawn broke. Behind him, guests gathered silently, each pretending shock while secretly measuring how convincingly everyone else performed innocence under pressure tonight. Then the grandfather clock struck thirteen, and Lady Ashcombe's eyes opened, fixing Vale with unmistakable accusation from beyond death itself. She spoke one word, barely audible: “Marrow,” before her eyes closed beneath the astonished portraits watching from the walls above. Vale rose slowly, understanding that the murderer had chosen the victim, the room, and perhaps even the detective as bait. Outside, thunder rolled across the hills, concealing footsteps that approached the library from an unlit corridor without disturbing anyone nearby.
created_at"2026-07-09T18:11:54.671Z" 7/9/2026, 6:11:54 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5817
moderation_latency(null)
generation_time6188
tokens_prompt46
tokens_completion289
native_tokens_prompt41
native_tokens_completion1193
native_tokens_completion_images0
native_tokens_reasoning989
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"
usage0.007199
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_06dcc26f0eb5a298016a4fe46ac00481958f987c3ff2ecc57f"
is_byokfalse
latency233
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-1783620714-e7bqdd3DsFOIdBsa18i4"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783620714-N1BjkmQJoY5iIb1SuRsD"
upstream_id"resp_06dcc26f0eb5a298016a4fe46ac00481958f987c3ff2ecc57f"
total_cost0.007199
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
sentences8
wordCounts
020
120
220
320
420
520
620
720