Run: 2026-03-09-01KK9PT2KW2RSTPHXKXWD0AK89

Run Details

Duration:
18.0s
Cost:
$0.013782
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 polished the cobblestones outside Blackthorn Manor, where every window glowed except the library, dark as a sealed confession tonight. When Inspector Vale arrived, the butler stood barefoot in the foyer, holding a silver tray and trembling above it silently. On the tray lay a fountain pen, a bloodied cufflink, and a note reading, I knew you yesterday too well. Vale crossed the threshold and smelled gunpowder, lilies, and brandy, scents that clung together like conspirators sharing one breath tonight. The victim sat upright behind the mahogany desk, eyes open, throat dark, as if death had interrupted a verdict midword. Only the grandfather clock moved, dragging each second across the room while seven silent portraits watched the inspector begin listening.
created_at"2026-03-09T16:27:44.646Z" 3/9/2026, 4:27:44 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency16530
moderation_latency(null)
generation_time17833
tokens_prompt46
tokens_completion199
native_tokens_prompt41
native_tokens_completion912
native_tokens_completion_images0
native_tokens_reasoning747
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"
usage0.0137825
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_068a685f42a1dd1d0169aef500bebc81958292ab75deed56f1"
is_byokfalse
latency154
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-1773073664-hWtLWkli224hmvl4ka9e"
upstream_id"resp_068a685f42a1dd1d0169aef500bebc81958292ab75deed56f1"
total_cost0.0137825
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