Run: 2026-03-18-01KM0ANJ98S7NFKHFDXBAFRDST

Run Details

Duration:
8.8s
Cost:
$0.001207
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 tapped the windows of Alderwick Hotel as detectives gathered, summoned by a scream from the ballroom at midnight quietly. Sergeant Hale studied the silent foyer, noticing fresh footprints leading from the doors toward a locked side office alone today. Inside, Mrs. Larkin lay beneath shattered chandeliers, her pearls scattered like stars across polished marble beneath the dim, swaying lights. Dr. Voss arrived with a case notebook, counting bruises, and refusing to touch anything until photographs were taken first carefully. The guests waited behind velvet curtains, each claiming innocence, while piano music ended abruptly after the scream for them all. Captain Rourke questioned the pianist, who swore his hands trembled when a stranger asked for quiet near the bar corner. Hale noticed a wilted lily in her fist, wrapped around a torn invitation bearing crimson wax matching last week's seal.
created_at"2026-03-18T11:18:05.876Z" 3/18/2026, 11:18:05 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8433
moderation_latency(null)
generation_time8619
tokens_prompt46
tokens_completion677
native_tokens_prompt41
native_tokens_completion959
native_tokens_completion_images0
native_tokens_reasoning774
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"
usage0.00120695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0167133f7df27b8e0169ba89edee148193b5c37ad041713fbe"
is_byokfalse
latency183
model_permaslug"openai/gpt-5.4-nano-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-1773832685-M0ixOtHVDsJhpFHGvChU"
upstream_id"resp_0167133f7df27b8e0169ba89edee148193b5c37ad041713fbe"
total_cost0.00120695
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620