Run: 2026-03-06-01KK1GAMWH8AQR9K9SPK8C1RPH

Run Details

Duration:
9.3s
Cost:
$0.003778
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
23.17% 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 hammered Blackthorn Hall as mourners gathered, their umbrellas trembling beneath a sky bruised purple by the approaching midnight storm. Inside, the grandfather clock struck twelve, and every portrait seemed to flinch while candlelight crawled over polished walnut walls. Lady Wren Ashcombe smiled too brightly at dinner, raising her crystal glass moments before collapsing across the linen. No one moved at first; then screams rose sharp and sudden, drowning the violin and silencing the servants. Detective Elias Vale, uninvited but nearby, stepped from the vestibule shadows, already counting faces, lies, and half-finished toasts. Upon the silver tray beside Lady Wren's limp hand rested a foxglove blossom, wet with spilled burgundy. The guests exchanged brittle glances, because everyone knew the conservatory had been locked since the gardener's funeral. Vale bent close, studying her lips, then the room, where grief mingled uneasily with calculation, fear, and opportunity. Outside, thunder rolled again, sealing Blackthorn Hall from the world, while somewhere upstairs a door clicked softly. By dawn, one of them would confess nothing, another would disappear, and the dead woman would keep accusing.
created_at"2026-03-06T12:00:32.397Z" 3/6/2026, 12:00:32 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency433
moderation_latency(null)
generation_time8955
tokens_prompt46
tokens_completion311
native_tokens_prompt41
native_tokens_completion245
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.0037775
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_051d6a29997bbc760169aac1e093b48195b7d1293b16e6f6ce"
is_byokfalse
latency186
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-1772798432-BTvJmTha9mLcS7N3XyxA"
upstream_id"resp_051d6a29997bbc760169aac1e093b48195b7d1293b16e6f6ce"
total_cost0.0037775
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
23.17% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
119
218
318
418
517
617
718
817
918