Run: 2026-02-16-01KHKANG2Q6W2MTKNY097T518P

Run Details

Duration:
44.7s
Cost:
$0.026841
Provider:
OpenAI

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 hammered the old boardinghouse as the power failed, leaving hallways breathing shadows and secrets in rhythmic darkness all night. Detective Mara Quinn arrived late, umbrella useless, drawn by a whispering call reporting thumps, arguments, and finally silence upstairs tonight. The caretaker met her barefoot, candle trembling, saying Mrs. Vale retired early, though everyone heard footsteps pacing after midnight downstairs. In Room Nine, damp wallpaper curled like peeling hands, and the window latch wore scratches arranged like pleading constellations outside. On the bed lay Mrs. Vale, throat bruised, eyes fixed beyond the ceiling, as if studying an approaching storm alone. A wine glass waited on the dresser, lipstick smudged twice, beside a single earring and threadbare Bible opened accusingly there. Mara kneeled, noticing faint ash on the carpet, like grey constellations pointing from the door toward the motionless hand beneath. Somewhere below, a clock stuttered thirteen, then twelve, a miscount echoed by plumbing groans and a muffled sob from somewhere. The caretaker prayed quickly, but Mara traced condensation on the mirror, revealing letters scrawled backwards: meet me downstairs at once. Lightning flared, and the corridor filled with neighbors, faces pale as unbaked clay, each insisting the others never left tonight.
created_at"2026-02-16T13:37:17.511506+00:00" 2/16/2026, 1:37:17 PM
model"openai/gpt-5-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4017
moderation_latency(null)
generation_time44414
tokens_prompt46
tokens_completion932
native_tokens_prompt41
native_tokens_completion2679
native_tokens_completion_images0
native_tokens_reasoning2368
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.02684125
router(null)
provider_responses
0
id"resp_01aa3b7f6eff134b0169931d606e7c8195a0d2c5de57072378"
status200
is_byokfalse
latency156
endpoint_id"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-2025-08-07"
api_type"completions"
id"gen-1771248992-UvpSwuOPthVERdL1Odru"
upstream_id"resp_01aa3b7f6eff134b0169931d606e7c8195a0d2c5de57072378"
total_cost0.02684125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920