Run: 2026-05-20-01KS25X7F41VTT4JNVKRDYXFZY

Run Details

Duration:
2.5s
Cost:
$0.002262
Provider:
Google AI Studio

Evaluation summary

Score Evaluator
Details Link
56.37% 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
Cold rain lashed against the cracked windowpane of the study, blurring the frantic flashing of distant blue police sirens. Inside, the ancient grandfather clock chimed midnight with a heavy vibration that seemed to echo through the dead man. Lord Arthur lay slumped across his massive mahogany desk, a spilled glass of rich burgundy soaking into the carpet. The velvet drapes rustled slightly as Detective Miller stepped quietly into the room, his long trench coat dripping wet. He bypassed the weeping widow clutching her pearls and knelt beside the frozen corpse to inspect the strange wounds. Two small, precise puncture marks on the side of the pale neck were oozing a thin trail of blood. A silver letter opener was still clutched in the victim's stiff hand, but no struggle had occurred here. Miller pulled a small magnifying glass from his deep pocket, sniffing the sweet almond scent rising from the glass. The deadly poison had worked incredibly fast, leaving the wealthy aristocrat absolutely no time to cry out for help. Every single guest remaining in the locked mansion possessed a dark secret and a perfect motive for this crime. Miller stood up slowly, looked at the trembling suspects gathered before him, and calmly locked the heavy wooden door.
created_at"2026-05-20T07:51:52.044Z" 5/20/2026, 7:51:52 AM
model"google/gemini-3.5-flash-20260519"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency734
moderation_latency(null)
generation_time2200
tokens_prompt46
tokens_completion322
native_tokens_prompt38
native_tokens_completion245
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)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"STOP"
service_tier"standard"
usage0.002262
router(null)
provider_responses
0
endpoint_id"bd50061c-e1d8-469e-96b1-d322e77378f8"
id"GGgNauuYFrCn1MkP7dSu4Qo"
is_byokfalse
latency734
model_permaslug"google/gemini-3.5-flash-20260519"
provider_name"Google AI Studio"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.15.0; linux; x64))"
http_referer(null)
request_id"req-1779263512-lbzsEgIbCAVLYvdWbGyP"
session_id(null)
api_type"completions"
id"gen-1779263512-MFgDL1sdsnJEEvBgFt2Y"
upstream_id"GGgNauuYFrCn1MkP7dSu4Qo"
total_cost0.002262
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
56.37% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
019
119
219
319
419
519
618
719
819
919
1019