Run: 2026-03-18-01KM09Z18MPSZWYH1N430HPTRT

Run Details

Duration:
1.9s
Cost:
$0.000237
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
3.67% 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
Detective Mara Kline arrived at Blackwell Manor, following rumors of stolen jewels and a sudden, silent death inside. The butler led her through corridors scented with lavender, where rain tapped stained glass like cautious fingertips. At the ballroom doors, Inspector Hargrove waited, insisting the victim fell alone, yet no footprints appeared. Lieutenant Sato measured the body beside an overturned violin, its strings gleaming oddly, unbroken despite chaos. Dr. Weller reported a puncture wound and poisoned blood, though the air smelled of clean, lemon polish. Mara studied the fireplace ash, finding a ring of soot too neat, as if arranged deliberately. Guests gathered behind velvet curtains, trading whispers, each denying access to the study during midnight. From the locked desk, Mara uncovered a torn invitation, addressed to no one, and signed with initials only.
created_at"2026-03-18T11:05:47.55Z" 3/18/2026, 11:05:47 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1069
moderation_latency(null)
generation_time1802
tokens_prompt46
tokens_completion228
native_tokens_prompt41
native_tokens_completion183
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"
usage0.00023695
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_07008306cfb5c1430169ba870b99cc8197b2c87f299dad9dee"
is_byokfalse
latency173
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-1773831947-kOQEbaRQgqlkzWiVn4bQ"
upstream_id"resp_07008306cfb5c1430169ba870b99cc8197b2c87f299dad9dee"
total_cost0.00023695
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
3.67% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
018
117
216
316
417
516
615
718