Run: 2026-03-18-01KM09F60608HZZWDR2C2EQ7Y7

Run Details

Model:
GPT-5.4 Mini (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.9s
Cost:
$0.002564
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 harbor into silver threads, while Detective Mara Vale climbed the lighthouse stairs, already dreading the night ahead. At the landing, she found the mayor's body posed beside a shattered lantern, one gloved hand clutching a folded note. No footprints marked the wet boards, no windows stood open, and the only witness was the sea, whispering below softly. Mara lifted the paper, read the single name written there, and knew the killer had invited her to dinner tonight.
created_at"2026-03-18T10:57:08.115Z" 3/18/2026, 10:57:08 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2739
moderation_latency(null)
generation_time2850
tokens_prompt46
tokens_completion127
native_tokens_prompt41
native_tokens_completion563
native_tokens_completion_images0
native_tokens_reasoning458
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"
usage0.00256425
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_07608a76c55bb7af0169ba85042b2c8196be310492be413444"
is_byokfalse
latency179
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-1773831428-xQ4SHFD5YR5r1mympDiy"
upstream_id"resp_07608a76c55bb7af0169ba85042b2c8196be310492be413444"
total_cost0.00256425
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences4
wordCounts
020
120
220
320