Run: 2026-07-25-01KYCW24DS965DW067MZ63Y0YM

Run Details

Duration:
2.2s
Cost:
$0.001535
Provider:
Google AI Studio

Evaluation summary

Score Evaluator
Details Link
60.65% 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
Thick fog wrapped around the old wooden docks as midnight chimed softly from the distant city church tower clock. Detective Vance pulled his collar up high against the bitter coastal wind and stepped over the slippery wet ropes. A single lantern flickered beside the dark barge, casting eerie, shifting shadows across the still and murky river water. Underneath the creaking deck boards lay the silent victim, dressed in a ruined velvet coat soaked in crimson blood. The dead man held a tiny silver key tightly inside his frozen right hand, concealing a dark, fatal secret. Vance knelt beside the cold corpse, carefully inspecting the mysterious wound that killed the prominent local banker so suddenly. No sound broke the heavy silence except for the distant cry of a lonely gull circling in the mist. "Someone wanted him dead tonight," Vance muttered softly to himself, noticing a faint scent of expensive French perfume nearby. This grim investigation was just beginning, and the dangerous killer was undoubtedly still watching from the surrounding dark night.
created_at"2026-07-25T14:49:54.882Z" 7/25/2026, 2:49:54 PM
model"google/gemini-3.6-flash-20260721"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency464
moderation_latency(null)
generation_time2178
tokens_prompt46
tokens_completion268
native_tokens_prompt38
native_tokens_completion197
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"default"
usage0.0015345
router(null)
provider_responses
0
endpoint_id"5d6d133d-a953-4781-a835-7ee76f4e1388"
id"Es1kaoK7OobJ-8YP9KmMiQY"
is_byokfalse
latency464
model_permaslug"google/gemini-3.6-flash-20260721"
provider_name"Google AI Studio"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784990994-3dILKnQoq5L5hjVejpkY"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784990994-9jb5xf4I14GYpmLDHRHi"
upstream_id"Es1kaoK7OobJ-8YP9KmMiQY"
total_cost0.0015345
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
60.65% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
019
119
219
319
419
519
619
719
819