Run: 2026-05-20-01KS25SXNQ80GF1XSK7BWS0GYF

Run Details

Duration:
2.6s
Cost:
$0.001326
Provider:
Google AI Studio

Evaluation summary

Score Evaluator
Details Link
73.77% 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 heavy velvet curtains muffled the sudden, wet gasp that marked the final breath of Lord Alistair’s only heir. Cold autumn rain drummed relentlessly against the stained-glass window of the library, washing away any hope of an easy escape. Inspector Charles took off his dripping overcoat and stepped carefully over the threshold into the dimly lit, horrific scene. A golden pocket watch lay shattered on the Persian rug, its delicate brass hands forever frozen at precisely midnight. None of the five terrified houseguests dared to look the grim investigator in the eye as he began his inquiry. One of these smiling aristocrats had poisoned the vintage port, turning a joyful family celebration into a deadly trap.
created_at"2026-05-20T07:50:03.719Z" 5/20/2026, 7:50:03 AM
model"google/gemini-3.5-flash-20260519"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency779
moderation_latency(null)
generation_time1584
tokens_prompt46
tokens_completion184
native_tokens_prompt38
native_tokens_completion141
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"
usage0.001326
router(null)
provider_responses
0
endpoint_id"bd50061c-e1d8-469e-96b1-d322e77378f8"
id"rGcNaujmL4zP_uMPl4zS0QI"
is_byokfalse
latency778
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-1779263404-buWFJHVmB6e2vSy49SCj"
session_id(null)
api_type"completions"
id"gen-1779263404-kNufA2DzyxS3VXlqngzb"
upstream_id"rGcNaujmL4zP_uMPl4zS0QI"
total_cost0.001326
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
73.77% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
019
120
219
319
420
519