Run: 2025-11-18-01KACP9G2FFTF2TX1BCV98C476

Run Details

Model:
Gemini 2.5 Pro
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
14.3s
Cost:
$0.015038
Provider:
Google AI Studio

Evaluation summary

Score Evaluator
Details Link
51.23% 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
Dust motes danced lazily in the single beam of moonlight slicing through the vast, silent, and mahogany-lined library. Lord Ashworth was slumped over his antique desk, his unseeing eyes reflecting the hundreds of leather-bound spines on shelves. A silver letter opener, its ornate handle gleaming, protruded from the starched white collar of his formal evening shirt. Inspector Miles surveyed the grim tableau, his expression unreadable as he took in every single detail of the room. Beside the victim's cold hand, a single, flawless white rose lay on a page of the ancient, open book.
created_at"2025-11-18T23:55:23.112141+00:00" 11/18/2025, 11:55:23 PM
model"google/gemini-2.5-pro"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2350
moderation_latency(null)
generation_time14232
tokens_prompt42
tokens_completion691
native_tokens_prompt38
native_tokens_completion1499
native_tokens_completion_images0
native_tokens_reasoning1380
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"STOP"
usage0.0150375
api_type"completions"
id"gen-1763510108-CDoiffJH9vBLNo630Bug"
upstream_id(null)
total_cost0.0150375
cache_discount(null)
upstream_inference_cost0
provider_name"Google AI Studio"

Evaluation details

Result Evaluator Details Meta Data
51.23% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
018
119
219
319
419