Run: 2026-03-18-01KM0AGZJ5M7639SF3YB14TV6V

Run Details

Duration:
10.3s
Cost:
$0.001262
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 boarded windows of Graywick Manor as I arrived, notebook open, searching for the missing jeweler today. In the foyer, lanterns flickered, and Detective Sloane whispered that someone found him dead beside the fountain at dawn quietly. I stepped over fallen roses, noticing a faint perfume trail leading toward the library door, swollen with damp fog inside. Sloane handed me a keyring slick with blood, warning that the lockbox held only receipts and lies this night too. Behind the glass display, the jeweler’s emerald disappeared, leaving powdery footprints that vanished into dust nearby almost immediately without sound. A maid trembled by the stairs, insisting she heard singing, then a crash, before silence swallowed everything for minutes straight. When Sloane lifted the corpse’s cuff, a torn cufflink glinted, engraved with initials L.R from someone who knew Graywick intimately.
created_at"2026-03-18T11:15:35.634Z" 3/18/2026, 11:15:35 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9903
moderation_latency(null)
generation_time10096
tokens_prompt46
tokens_completion637
native_tokens_prompt41
native_tokens_completion1003
native_tokens_completion_images0
native_tokens_reasoning809
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"
usage0.00126195
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_019933666a4b14620169ba8957b0b8819783fdecd455f5aa2e"
is_byokfalse
latency157
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-1773832535-m2Tg2xbAmZnOSPXJcxyP"
upstream_id"resp_019933666a4b14620169ba8957b0b8819783fdecd455f5aa2e"
total_cost0.00126195
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620