Run: 2026-03-18-01KM09ZY2ANDE95Z1ACNT5A6T9

Run Details

Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
13.0s
Cost:
$0.003131
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain lacquered the manor windows as midnight swallowed the estate. Inside, Inspector Vale studied the corpse and the locked doors. A silver candlestick lay nearby, polished clean except for blood. Three guests waited silently, each avoiding the others' terrified eyes. Somewhere upstairs, a violin began playing a thin, slow lament. Then Vale smiled, because every lie in the room weighed.
created_at"2026-03-18T11:06:17.048Z" 3/18/2026, 11:06:17 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency12779
moderation_latency(null)
generation_time12841
tokens_prompt46
tokens_completion578
native_tokens_prompt41
native_tokens_completion689
native_tokens_completion_images0
native_tokens_reasoning607
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"
usage0.00313125
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_04e71200fb79c7940169ba87291ee881958aefd01527619651"
is_byokfalse
latency261
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-1773831977-jEaXNnsPsojAOC1KjEJC"
upstream_id"resp_04e71200fb79c7940169ba87291ee881958aefd01527619651"
total_cost0.00313125
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
010
110
210
310
410
510