Run: 2026-02-16-01KHK9B02PKN7TDTXZ6P5T731S

Run Details

Duration:
25.7s
Cost:
$0.013571
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 hammered the stained glass windows as the guests assembled in Ashcroft Manor, pretending civility over simmering resentments that evening. I had not planned to attend, yet Sir Lionel's cryptic telegram promised revelations impossible for any investigator ignoring this summons. The drawing room smelled of cigar smoke, expensive perfume, and something metallic beneath, faint yet persistent like a guilty memory. Lady Beatrice drifted between conversations, smile brittle, pearls twitching whenever her gaze brushed the locked study at the landing door. Colonel Hargrove monopolized the fireplace, booming anecdotes from forgotten campaigns, though his watchful eyes measured every entrance and exit carefully. Near the piano, Reverend Cole shuffled hymn sheets he would never play, glancing repeatedly at the decanter of whisky nearby. Only Marianne, Sir Lionel's ward, seemed genuinely cheerful, though her laughter stopped whenever footsteps sounded overhead in corridors above us. The butler, Pritchard, announced dinner precisely at eight, his gloved hands trembling as though the silver cloche concealed dynamite tonight. We had barely taken our seats when a thunderclap shook the chandeliers and extinguished three candles nearest Sir Lionel himself. When the lights flickered back, Sir Lionel slumped forward into his soup, a dark ribbon spreading silently across porcelain surface.
created_at"2026-02-16T13:13:45.737551+00:00" 2/16/2026, 1:13:45 PM
model"openai/gpt-5.1-20251113"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5267
moderation_latency(null)
generation_time25589
tokens_prompt46
tokens_completion1029
native_tokens_prompt41
native_tokens_completion1352
native_tokens_completion_images0
native_tokens_reasoning1078
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"
usage0.01357125
router(null)
provider_responses
0
id"resp_0bb56778e878064201699317efca388195ac07d737f4731ad2"
status200
is_byokfalse
latency159
endpoint_id"764eb97f-8bab-4326-b29b-7a8799b00a70"
provider_name"OpenAI"
model_permaslug"openai/gpt-5.1-20251113"
api_type"completions"
id"gen-1771247599-UzafVwt9EXfqgQ5mJGX0"
upstream_id"resp_0bb56778e878064201699317efca388195ac07d737f4731ad2"
total_cost0.01357125
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