Run: 2026-03-18-01KM0AHW0FFDP9G43DV94PGBJG

Run Details

Duration:
6.1s
Cost:
$0.001239
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
The rain tapped the manor windows as Detective Marlowe arrived, summoned by a single scream from the conservatory tonight alone. Inside, servants whispered that Lord Sutter vanished, yet his study door hung open like a warning for anyone daring entry. A body lay beside the orchids, pale as paper, with ink stains circling his lifeless right hand beneath lamplight quietly. Marlowe knelt, breathing carefully, and noticed a torn letter sealed with wax from Parliament in pocket of the victim's coat. Mrs. Hale insisted she heard music, then footsteps, but claimed she never looked toward the cry until Marlowe asked questions. Beyond the curtains, a locked gate rattled, suggesting someone exited after the murder occurred yet left no prints on gravel.
created_at"2026-03-18T11:16:04.766Z" 3/18/2026, 11:16:04 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5768
moderation_latency(null)
generation_time5967
tokens_prompt46
tokens_completion195
native_tokens_prompt41
native_tokens_completion985
native_tokens_completion_images0
native_tokens_reasoning821
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"
usage0.00123945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0865fe5f8dbad8cf0169ba8974da7c81949244724c6f3151c3"
is_byokfalse
latency202
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-1773832564-HyaQ6tIxWV24HnXvMiE9"
upstream_id"resp_0865fe5f8dbad8cf0169ba8974da7c81949244724c6f3151c3"
total_cost0.00123945
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
520