Run: 2026-03-18-01KM08Y5SF08S374E1WWTCAAC6

Run Details

Duration:
7.7s
Cost:
$0.004382
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 mansion windows as Elias Vale climbed the marble steps, clutching the invitation that smelled faintly of smoke. Inside, candles trembled above a dining table set for twelve, though only eleven guests had answered Lady Merrow's summons tonight. A silver bell rang once, and every conversation died when the butler revealed the host had vanished before supper began. Then Eleanor noticed blood on the hearth, a dark thread leading from the fireplace toward the locked library door nearby. When the lights failed, someone screamed, and Elias realized the killer was already among them, breathing softly in darkness there.
created_at"2026-03-18T10:47:50.842Z" 3/18/2026, 10:47:50 AM
model"openai/gpt-5.4-mini-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency7443
moderation_latency(null)
generation_time7617
tokens_prompt46
tokens_completion457
native_tokens_prompt41
native_tokens_completion967
native_tokens_completion_images0
native_tokens_reasoning842
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"
usage0.00438225
router(null)
provider_responses
0
endpoint_id"9ee065b2-3d1c-43bc-bdd7-28af3b148282"
id"resp_00aeedae940db6f30169ba82d6e4948190b55f9cb1c3f09466"
is_byokfalse
latency192
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-1773830870-siHOMcJe9ZW9D4tOYjkI"
upstream_id"resp_00aeedae940db6f30169ba82d6e4948190b55f9cb1c3f09466"
total_cost0.00438225
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