Run: 2026-03-18-01KM09HTYNKFXBV4JN2YMRSQ2E

Run Details

Duration:
7.0s
Cost:
$0.000972
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 sealed Briarwood Pier in silence, and Detective Mara Ellison arrived at dawn with a dented notebook today alone. A fisherman lay facedown among gull feathers, his coat snagged on rusted pilings beneath the pier’s lanterns flickering weakly outside. Mara knelt, noting no blood pool, only a chalky bruise at his throat and strange mint odor from his pocket. Constable Reyes whispered that the victim’s watch stopped exactly at 3:13, though clocks nearby disagreed by minutes each hour yesterday. On the boards, a single bootprint circled him twice, as if someone measured steps carefully before disappearing into fog again. When the mayor’s secretary arrived, she carried gloves and requested privacy, smiling at Mara’s questions too brightly for this scene.
created_at"2026-03-18T10:58:35.103Z" 3/18/2026, 10:58:35 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency6651
moderation_latency(null)
generation_time6829
tokens_prompt46
tokens_completion530
native_tokens_prompt41
native_tokens_completion771
native_tokens_completion_images0
native_tokens_reasoning599
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"
usage0.00097195
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_0c31075cdb627e680169ba855b2b348196ae3a8dde8e1f2399"
is_byokfalse
latency209
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-1773831515-1j6nTQcmaAyuQ1Nl9Xq2"
upstream_id"resp_0c31075cdb627e680169ba855b2b348196ae3a8dde8e1f2399"
total_cost0.00097195
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