Run: 2026-03-18-01KM099SR6FHA3AFS8Q02Q255N

Run Details

Duration:
18.3s
Cost:
$0.013292
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 pressed against the manor windows as Inspector Vale arrived, and his coat and thoughts were already damp with dread. The housekeeper opened the door without speaking, and the silence beyond her seemed rehearsed, deliberate, and strangely guilty already tonight. In the library, Lord Marrow lay slumped beside the fire, one hand reaching toward a shattered crystal decanter, already cold. Vale noticed the missing watch first, then the bloodless smile, then the chessboard set for a game unfinished by midnight. A silver letter opener glinted beneath Marrow's fingers, and beside it, a faint perfume lingered, expensive and unfamiliar to Vale. Outside, thunder rolled like a verdict, and Inspector Vale understood the murderer had stayed close enough to watch every move.
created_at"2026-03-18T10:54:11.736Z" 3/18/2026, 10:54:11 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency17965
moderation_latency(null)
generation_time18161
tokens_prompt46
tokens_completion853
native_tokens_prompt41
native_tokens_completion2947
native_tokens_completion_images0
native_tokens_reasoning2790
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"
usage0.01329225
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_034faee62dedb21e0169ba8453c9488195bc2f40ae02deff33"
is_byokfalse
latency192
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-1773831251-QqAHhHVzYftxBQpVqBFs"
upstream_id"resp_034faee62dedb21e0169ba8453c9488195bc2f40ae02deff33"
total_cost0.01329225
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