Run: 2026-03-18-01KM0ANBCNJPZ2EF1DK5A1YV12

Run Details

Duration:
1.9s
Cost:
$0.000746
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
73.77% Matches word count (details)

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 stitched the manor windows shut, while Inspector Vale climbed the marble steps, already sensing the house was holding breath. Inside, candles trembled over portraits, and Lady Merritt’s guests clustered silently, each avoiding the still figure beside the grand piano. The dead man wore a silver cufflink shaped like a raven, and his open eyes reflected a clock stopped at midnight. Vale knelt, noting the bloodless wound, the missing weapon, and the faint scent of lavender drifting from somewhere upstairs. No one spoke until the butler whispered that every door had been locked from within, moments before the scream. Vale looked around the room, studying trembling hands, composed faces, and one empty champagne glass with a lipstick mark.
created_at"2026-03-18T11:17:58.82Z" 3/18/2026, 11:17:58 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency439
moderation_latency(null)
generation_time1758
tokens_prompt46
tokens_completion194
native_tokens_prompt41
native_tokens_completion159
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00074625
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_066df81ba7e0610b0169ba89e6df4c819490ffa623782a8ca3"
is_byokfalse
latency178
model_permaslug"openai/gpt-5.4-mini-20260317"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773832678-j1V7H7aIngLL14735j3N"
upstream_id"resp_066df81ba7e0610b0169ba89e6df4c819490ffa623782a8ca3"
total_cost0.00074625
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
73.77% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
221
319
419
519