Run: 2026-03-18-01KM09K7QPMK67E23FDT7XXS4V

Run Details

Duration:
6.7s
Cost:
$0.007055
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 mansion windows as Detective Mara Vale stepped inside, carrying a notebook, a flashlight, and a growing dread. The chandelier flickered above the ballroom, where guests whispered around a body on the marble floor, untouched except for blood. No one had heard the shot, yet the victim's pocket watch lay open, stopped at exactly midnight, and smeared red. Mara crouched beside him, noticing three wet footprints leading toward the library, each one smaller than the last, despite everything. She followed them anyway, and when the library door creaked open, someone already knew her name from the darkness inside.
created_at"2026-03-18T10:59:20.965Z" 3/18/2026, 10:59:20 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6443
moderation_latency(null)
generation_time6555
tokens_prompt46
tokens_completion283
native_tokens_prompt41
native_tokens_completion1561
native_tokens_completion_images0
native_tokens_reasoning1427
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"
usage0.00705525
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0ee97b98f59848960169ba8589057081949cc904ae87618ff2"
is_byokfalse
latency173
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-1773831560-y4ja8zuQCWCOgMENxpAD"
upstream_id"resp_0ee97b98f59848960169ba8589057081949cc904ae87618ff2"
total_cost0.00705525
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420