Run: 2026-02-16-01KHKB0MCM4Z47RV2DV0SGTEMZ

Run Details

Duration:
28.6s
Cost:
$0.005260
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 tapped the high windows as Inspector Hale stepped into the drawing room, boots leaving dark arcs on marble tiles. A body lay beneath the chandelier, face obscured by a silk scarf and one white glove stiff as frozen porcelain. Guests clustered by the windows, voices hushed into frightened whispers as lightning sketched pale fingers across their faces and portraits. Lady Ashcombe clung to a gilded chair, knuckles white beneath her lace gloves, lips trembling without sound since the murder. The butler's hands shook when offering tea, a thin smile refusing to reach eyes milky with suppressed panic and duty. Inspector Hale crouched near the corpse, examining a smear of crimson on the carpet with meticulous measured care and patience. Outside, a clock began to chime midnight, each toll folding another second into a room suddenly full of accusation now.
created_at"2026-02-16T13:43:06.255484+00:00" 2/16/2026, 1:43:06 PM
model"openai/gpt-5-mini-2025-08-07"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency26041
moderation_latency(null)
generation_time28379
tokens_prompt46
tokens_completion224
native_tokens_prompt41
native_tokens_completion2625
native_tokens_completion_images0
native_tokens_reasoning2432
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"
usage0.00526025
router(null)
provider_responses
0
id"resp_0be675ffe0631dc00169931ecd48dc81969b72fb2ec3e4b560"
status200
is_byokfalse
latency137
endpoint_id"c4f66d01-20b0-4c27-a225-438ea22fda43"
provider_name"OpenAI"
model_permaslug"openai/gpt-5-mini-2025-08-07"
api_type"completions"
id"gen-1771249357-alhi3a4blSbJltezfgcm"
upstream_id"resp_0be675ffe0631dc00169931ecd48dc81969b72fb2ec3e4b560"
total_cost0.00526025
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620