Run: 2026-03-18-01KM0ARY6MKC1XRDP00201C873

Run Details

Duration:
2.0s
Cost:
$0.000199
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
3.18% 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 clock tower chimed midnight as rain polished cobblestones outside Marrowick Manor, where guests waited anxiously inside. Detective Elara Voss arrived quietly, carrying a notebook, while butler Finch watched every shadow with practiced suspicion. On the drawing-room rug lay Sir Alistair, face pale, eyes open, and a silver letter-opener clenched tightly. The housekeeper screamed once, then trembled; Doctor Halden declared him dead, yet offered no clear cause immediately. Guests gathered in uneasy circles, arguing over keys, wagers, and who last saw the victim before dinner. A single footprint, muddy and fresh, led from the library, stopping beside the window latch, untouched by cleaning.
created_at"2026-03-18T11:19:56.384Z" 3/18/2026, 11:19:56 AM
model"openai/gpt-5.4-nano-20260317"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1135
moderation_latency(null)
generation_time1555
tokens_prompt46
tokens_completion181
native_tokens_prompt41
native_tokens_completion153
native_tokens_completion_images0
native_tokens_reasoning0
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"
usage0.00019945
router(null)
provider_responses
0
endpoint_id"0c835f2e-c18d-4e8c-b245-e1e3bd08b97f"
id"resp_07611454781baabc0169ba8a5c755081938bb0a1b366b5d992"
is_byokfalse
latency214
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-1773832796-q7cIB1HSF2MZIxCvwvRg"
upstream_id"resp_07611454781baabc0169ba8a5c755081938bb0a1b366b5d992"
total_cost0.00019945
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
3.18% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
017
117
217
317
417
518