Run: 2026-02-16-01KHKA9YDFJBVZXFZ7686MJHXV

Run Details

Duration:
17.1s
Cost:
$0.015164
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
Fog drifted over Blackwater Manor as the last guests departed, leaving lanterns guttering in the courtyard stones at midnight silently. Inside, Clara Finch found the library door ajar and heard a soft thud behind the velvet curtains just then again. She pushed through, smelling cigar smoke and rain, and saw Colonel Wren sprawled beside the fireplace, unmoving in ashen silence. A silver letter opener protruded from his chest, and the clock above him ticked with nervous precision for all watching. Clara's scream summoned the household, but Detective Hale arrived first, coat dripping, eyes sharp as cut glass in that moment. He knelt, touched the opener, and noted no blood on its handle, only a faint scent of almonds nearby books. The guests returned to the hall, whispering alibis, while Hale studied muddy footprints leading toward the conservatory door outside alone. On the mantel, a torn invitation lay beneath a chess king, and Hale smiled at the missing queen tonight too.
created_at"2026-02-16T13:30:31.411827+00:00" 2/16/2026, 1:30:31 PM
model"openai/gpt-5.2-20251211"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5209
moderation_latency(null)
generation_time16887
tokens_prompt46
tokens_completion635
native_tokens_prompt41
native_tokens_completion1078
native_tokens_completion_images0
native_tokens_reasoning862
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"
usage0.01516375
router(null)
provider_responses
0
id"resp_05a8327daa2bde5e0169931be5e82c8197a707e3dc2de37867"
status200
is_byokfalse
latency182
endpoint_id"f00142c2-6a93-49ce-9e36-5593b904ce3b"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.2-20251211"
api_type"completions"
id"gen-1771248613-Ue2rRTKBYK0VNl0WJmHW"
upstream_id"resp_05a8327daa2bde5e0169931be5e82c8197a707e3dc2de37867"
total_cost0.01516375
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.0000% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720