Run: 2026-03-18-01KM09TN6NHJDEHC97A4VZ5QGT

Run Details

Duration:
10.7s
Cost:
$0.004292
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% 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 town square into silver threads as Detective Mara Vale approached the mansion, already smelling money and fear. A bell tolled inside, though the front doors stood open, and a woman in black waited beside a shattered vase. She did not introduce herself, only pointed at the staircase where crimson droplets climbed the banister like deliberate punctuation marks. Mara crouched, touched the nearest drop, and felt the wet certainty of fresh violence beneath the mansion's expensive perfume there. From the ballroom came a single scream, abruptly cut short, and every guest turned toward the darkened archway at once. Mara rose slowly, because murders rarely announced themselves this neatly, and someone in the house was still pretending innocence tonight.
created_at"2026-03-18T11:03:24.131Z" 3/18/2026, 11:03:24 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10371
moderation_latency(null)
generation_time10549
tokens_prompt46
tokens_completion457
native_tokens_prompt41
native_tokens_completion947
native_tokens_completion_images0
native_tokens_reasoning799
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"
usage0.00429225
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_069df379b119262d0169ba867c2ef88197b8df8cfe8a6c2c88"
is_byokfalse
latency187
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-1773831804-rH2shDl7Fvk6Pb5ACGOe"
upstream_id"resp_069df379b119262d0169ba867c2ef88197b8df8cfe8a6c2c88"
total_cost0.00429225
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520