Run: 2026-02-16-01KHK9WS09Z1VRPRJ98WX3NJFJ

Run Details

Duration:
47.4s
Cost:
$0.001460
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 smeared the city windows as dawn approached, and Detective Mara Voss surveyed the quiet rain washed street below silently. A body lay beneath a flickering streetlamp, velvet cloak pooled crimson, and witnesses whispered murder beside trembling pigeons inconsolably tonight. The victim wore an antiquated brooch shaped like a moth, pinprick revealing something darker beneath glittering surface masking secrets hidden. A velvet rope remained around the crime scene, but someone had slipped a note beneath it, ink still damp tonight. The note, folded twice, bore only initials and a date scrawled in hurried, anxious script that did not belong here. Dawn brightened, but the city felt heavier, as if every passerby concealed a motive, every alley listening to whispers everywhere.
created_at"2026-02-16T13:23:50.099078+00:00" 2/16/2026, 1:23:50 PM
model"openai/gpt-5-nano-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3254
moderation_latency(null)
generation_time46727
tokens_prompt46
tokens_completion873
native_tokens_prompt41
native_tokens_completion3645
native_tokens_completion_images0
native_tokens_reasoning3456
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"
usage0.00146005
router(null)
provider_responses
0
id"resp_0d5fc9996791121b0169931a366288819695c8bec287fd0820"
status200
is_byokfalse
latency137
endpoint_id"50329d77-04e1-4979-a184-c33030289476"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-nano-2025-08-07"
api_type"completions"
id"gen-1771248182-yvtcOUc1RJrkZDO57Hzr"
upstream_id"resp_0d5fc9996791121b0169931a366288819695c8bec287fd0820"
total_cost0.00146005
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520