Run: 2026-09-23-01M36NVACHCMAABZC8BCB3XDVE

Run Details

Duration:
20.3s
Cost:
$0.001051
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, the manor clock struck thirteen, and every guest in the drawing room turned toward the locked conservatory door. Behind its frosted glass, a shadow leaned briefly against the panes, then vanished before Inspector Vale could reach the handle. When he entered, the room smelled of wet roses, extinguished candles, and a metallic odor beneath the heavy velvet curtains. Lord Ashcombe lay beside the piano, one hand around a silver key, his white dinner jacket darkened at the heart. No one screamed; the guests simply watched Vale, as though the dead man had asked them something in the darkness. Vale noticed Lady Wren's gloves were dry, though rain had followed every other guest through the front doors since dusk. Then the clock struck thirteen, and Ashcombe's fingers tightened around the key in Vale's palm, which had begun to tremble. From the gallery above, someone whispered, “You have the wrong key,” though no guest had moved since Vale came inside.
created_at"2026-09-23T08:24:22.678Z" 9/23/2026, 8:24:22 AM
model"openai/gpt-6-luna-20260922"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency19372
moderation_latency(null)
generation_time20262
tokens_prompt46
tokens_completion250
native_tokens_prompt41
native_tokens_completion2094
native_tokens_completion_images0
native_tokens_reasoning1891
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"
usage0.0010511
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790151862-Qt8wBRUWahGXJCQoKrjH"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790151862-W0qpgrnjDipQ4PoSxvqo"
upstream_id"resp_0db52e416fbc9d99016ab38cb6c47c87d1b15ad80e8809b033"
provider_responses
0
endpoint_id"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id"resp_0db52e416fbc9d99016ab38cb6c47c87d1b15ad80e8809b033"
is_byokfalse
latency1455
model_permaslug"openai/gpt-6-luna-20260922"
provider_name"OpenAI"
status200
total_cost0.0010511
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

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