Run: 2026-03-18-01KM079AMEC1YNEG3ZC55MD13N

Run Details

Duration:
11.6s
Cost:
$0.007388
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 stitched the manor windows as Inspector Vale arrived, carrying the kind of silence that makes servants stop breathing instantly. Inside the grand hall smelled of wax, wet wool, and something sharper, while a violin played from the dark above. At the staircase, Lady Merrow lay crumpled beneath the chandelier, her pearl necklace snapped, her gloves arranged like evidence already. No one had touched the body, the butler insisted, yet Vale noticed muddy footprints circling it, patient and deliberate too. When he lifted the fallen hand, he found a chess piece clutched in the dead woman's fist, black as sin.
created_at"2026-03-18T10:18:59.291Z" 3/18/2026, 10:18:59 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10841
moderation_latency(null)
generation_time10930
tokens_prompt46
tokens_completion537
native_tokens_prompt41
native_tokens_completion1635
native_tokens_completion_images0
native_tokens_reasoning1505
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"
usage0.00738825
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_08a58a7498378d8c0169ba7c13a5f08197a96292ce2b241ea7"
is_byokfalse
latency246
model_permaslug"openai/gpt-5.4-mini-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-1773829139-7ghcJ8Cnm7jZWq01zPos"
upstream_id"resp_08a58a7498378d8c0169ba7c13a5f08197a96292ce2b241ea7"
total_cost0.00738825
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420