Run: 2026-02-16-01KHKAC24Z58M1RQ03BHG5FQBQ

Run Details

Duration:
53.9s
Cost:
$0.036301
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 pinned the harbor town beneath sheets of glassy darkness as the ferry horn moaned across sleeping water at midnight. Detective Mara Ellison stepped off the pier, collar raised, watching gulls circle like cautions scribbled onto the stormy sky above. The inn waited uphill, shingles sweating, windows dark except one square bleeding amber through curtains drawn with reluctant hands inside. Mara smelled iodine, old rope, and smoke clinging to the hedges, a harbor's inventory signed by invisible tides this night. Inside, the lobby grandfather clock halted at two, a brass sentinel pointing forever toward a promise it couldn't keep alone. The manager, pale and blinking, met Mara beneath an antlered shadow and whispered, someone upstairs will not answer anymore tonight. They climbed creaking steps, each groan persuading silence to loosen, revealing threadbare runner, salt stains, and a faint mechanical ticking. Room thirteen's door stood ajar, a teaspoon glinting on carpet like a discarded moon, its bowl sticky with crimson threads. Inside, the air was theatrical, heavy velvet draped over breath, and the window rattled despite the locked, obedient latch there. On the bed lay Mr. Carrow, landlord, eyes astonished by nothing, throat smiling wrong, postcards fanned like guilty feathers nearby. Mara counted three wet rings on the nightstand, then one missing coaster, a careless absence glowing brighter than fingerprints here. Outside, the ferry mourned again, and somewhere below the waves, the town's truths shifted like anchors dragged by sleepwalkers slowly.
created_at"2026-02-16T13:32:18.030952+00:00" 2/16/2026, 1:32:18 PM
model"openai/gpt-5-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8519
moderation_latency(null)
generation_time53403
tokens_prompt46
tokens_completion1170
native_tokens_prompt41
native_tokens_completion3625
native_tokens_completion_images0
native_tokens_reasoning3264
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"
usage0.03630125
router(null)
provider_responses
0
id"resp_08c8a0d1a46e17620169931c2b552c81979065ed4a7e6e8256"
status200
is_byokfalse
latency160
endpoint_id"7c2f859a-7890-4e8e-b1de-1cd1c0a800b4"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-2025-08-07"
api_type"completions"
id"gen-1771248683-V08XBUbyPGM55F6C65sq"
upstream_id"resp_08c8a0d1a46e17620169931c2b552c81979065ed4a7e6e8256"
total_cost0.03630125
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
020
120
220
320
420
520
620
720
820
920
1020
1120