Run: 2026-03-18-01KM09J6RZT2FTVFKYJPNCYFQ3

Run Details

Duration:
939ms
Cost:
$0.000427
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 Detective Vale arrived, carrying a lantern, a notebook, and a suspicion nobody welcomed. Inside, the ballroom smelled of lilies, whiskey, and fear, and twelve guests turned toward him with practiced, brittle smiles. At the chandelier’s center, Sir Alistair lay sprawled beneath shattered crystal, his gloved hand still clutching a sealed invitation.
created_at"2026-03-18T10:58:47.21Z" 3/18/2026, 10:58:47 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency421
moderation_latency(null)
generation_time859
tokens_prompt46
tokens_completion103
native_tokens_prompt41
native_tokens_completion88
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"
usage0.00042675
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_0c4e89a62d1cdd230169ba856749fc81909ca76ef490215413"
is_byokfalse
latency212
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-1773831527-sEiHZSIcBGK8Q6X77N50"
upstream_id"resp_0c4e89a62d1cdd230169ba856749fc81909ca76ef490215413"
total_cost0.00042675
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
73.77% Matches word count n/a
neededCleanfalse
sentences3
wordCounts
020
119
219