Run: 2026-03-18-01KM09BS4M8MGTCFR77V3DTQNV

Run Details

Duration:
1.4s
Cost:
$0.000850
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
83.14% 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 guests whispered over silverware and secrets, unaware that someone had already arranged death. Inspector Vale arrived late, carrying a damp coat, a notebook, and the tired expression of someone expecting lies tonight. In the ballroom, Lady Merrow lay beside the piano, her pearl necklace snapped, her hand still clutching a burned match. No one screamed immediately; first came silence, then the careful shifting of suspects, each remembering something inconvenient about the victim. Vale knelt, studying the carpet, where muddy prints led nowhere and a faint scent of lavender masked something sharper. The butler insisted the doors stayed locked, though his trembling fingers suggested he had unlocked them for someone after midnight. Above the storm, a clock struck once, and every guest turned toward the sound, as if hearing a verdict.
created_at"2026-03-18T10:55:16.641Z" 3/18/2026, 10:55:16 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency385
moderation_latency(null)
generation_time1265
tokens_prompt46
tokens_completion229
native_tokens_prompt41
native_tokens_completion182
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"
usage0.00084975
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0c005d9f725fbb330169ba8494b18881969cea02ba1655e2ab"
is_byokfalse
latency167
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-1773831316-UDFHCz2DMX8FmlIktTyt"
upstream_id"resp_0c005d9f725fbb330169ba8494b18881969cea02ba1655e2ab"
total_cost0.00084975
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
83.14% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
119
220
320
419
520
619