Run: 2026-02-16-01KHKA1MNFAZ14G2V33T3DS1S2

Run Details

Duration:
34.8s
Cost:
$0.006194
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 hissed against the fogged windows while a clock in the hallway struck midnight with indifferent, metallic patience and secrets. On the rug beneath the chandelier, a crimson stain bloomed like a vulgar flower, dark and impossibly deliberate this morning. Detective Marlowe arrived wearing an overcoat still damp from the storm, eyes tired, hands shoved into pockets and cigarette smoke. He swallowed the night like medicine, examined the room with professional hunger, cataloguing alibis and small conflicting truths and lies. A woman in mourning sat perfectly still by the piano, fingers white around glass, lips pressed to a memory only. Guests lingered in corners, pretending conversation, relishing scandalous whispers, shifting like restless moths around the corpse's dim glow and suspicion. A single neighbor claimed he heard raised voices, then a peculiar silence, the kind that settles before impossible things tonight. Footsteps led away toward an iron gate squeaking like an accusation, leaving muddy prints and a scent of lavender always. The victim's hand still clutched a torn letter, ink bleeding like a failing pulse, the signature scrawled in haste yesterday. Marlowe's assistant waited by the doorway, a small man with a notebook of questions and a tendency to cry often.
created_at"2026-02-16T13:26:17.234337+00:00" 2/16/2026, 1:26:17 PM
model"openai/gpt-5-mini-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2135
moderation_latency(null)
generation_time34638
tokens_prompt46
tokens_completion1074
native_tokens_prompt41
native_tokens_completion3092
native_tokens_completion_images0
native_tokens_reasoning2816
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"
usage0.00619425
router(null)
provider_responses
0
id"resp_07a3a0362943a8320169931ad5bf848194a69ab06cc6295bd1"
status200
is_byokfalse
latency120
endpoint_id"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-mini-2025-08-07"
api_type"completions"
id"gen-1771248341-u4EtoGCaIZjdLQHcU4DA"
upstream_id"resp_07a3a0362943a8320169931ad5bf848194a69ab06cc6295bd1"
total_cost0.00619425
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