Run: 2026-03-18-01KM0ANWZXXDQ9GFBEW4VGS7SZ

Run Details

Duration:
7.1s
Cost:
$0.001299
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
At dusk, Detective Mara Quinn entered Blackwood Manor, where rain tapped windows like fingers on glass for her weary investigation. Inside, the housekeeper whispered that Lord Harren lay dead upstairs, and the butler barred every corridor with silent, shaking hands. Mara climbed the stairs, noting overturned chairs below, and a faint scent of lilac clinging to wallpaper near landing door. In the study, Harren's eyes stared wide, while a silver candlestick cooled beside a broken clock stopped exactly at midnight. Four guests stood behind her, arguing softly over alibis, each refusing to meet her gaze beneath portraits drenched in candlelight. Mara opened her notebook, promising justice, then asked who had served the final brandy to Harren before lights went out.
created_at"2026-03-18T11:18:16.84Z" 3/18/2026, 11:18:16 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6816
moderation_latency(null)
generation_time6976
tokens_prompt46
tokens_completion317
native_tokens_prompt41
native_tokens_completion1033
native_tokens_completion_images0
native_tokens_reasoning866
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"
usage0.00129945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_008c2e4c86a9e6bf0169ba89f8e6788196811a9ba8389e80f5"
is_byokfalse
latency163
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-1773832696-NgHZ11yJpdq7g5Ou27qa"
upstream_id"resp_008c2e4c86a9e6bf0169ba89f8e6788196811a9ba8389e80f5"
total_cost0.00129945
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