Run: 2026-03-09-01KK9Q3CQVZG7KB5QX6R1KQNTX

Run Details

Duration:
26.2s
Cost:
$0.025138
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 worried the manor windows while guests in black silk drifted through the foyer, pretending the storm outside mattered more. At half past ten, Lady Hargreave raised her glass, smiled at no one, and suddenly collapsed beside the grandfather clock. The violinist missed a note; then silence spread, cold and deliberate, as crimson threaded between the tiles beneath her slippers. Before anyone moved, the candles guttered, the doors slammed shut, and someone laughed softly from the unlit gallery above them. Inspector Vale, uninvited and inconveniently sober, stepped from pantry shadows, studying faces first and the sprawled corpse second that night. He bent once, touched the shattered stemware, and announced that the killer remained inside the room, listening in careful silence.
created_at"2026-03-09T16:32:49.928Z" 3/9/2026, 4:32:49 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency25491
moderation_latency(null)
generation_time25623
tokens_prompt46
tokens_completion892
native_tokens_prompt41
native_tokens_completion1669
native_tokens_completion_images0
native_tokens_reasoning1509
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"
usage0.0251375
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0ecfc90b6bd316cf0169aef63200fc8195b3e3022a94029c5c"
is_byokfalse
latency185
model_permaslug"openai/gpt-5.4-20260305"
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-1773073969-YrxfrigjHbUvmK7R53J3"
upstream_id"resp_0ecfc90b6bd316cf0169aef63200fc8195b3e3022a94029c5c"
total_cost0.0251375
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