Run: 2025-11-18-01KACP363TK1KXY54BYRJA1W1F

Run Details

Model:: Gemini 2.5 Pro
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 12.0s
Cost:: $0.012868
Provider:: Google AI Studio

Evaluation summary

Score	Evaluator	Details Link
91.26%	Matches word count	(details)

Model input

User/Human

Please write the opening scene of a murder mystery where each sentence has exactly 10 words.
Please make sure that each sentence has the same length. Only return the opening itself.

Model response

The old library was silent, a tomb for forgotten words.
Dust motes danced in the single, slanting moonbeam.
Upon the rich Persian rug, Lord Ashworth lay very still.
A silver letter opener protruded from his expensive tweed vest.
His vacant eyes stared sightlessly at the ornate, high ceiling.
A half-empty glass of brandy sat beside one cold hand.
One priceless, ancient book was lying open on the floor.
The grandfather clock had stopped at the stroke of midnight.

Evaluation details

Result

Evaluator

Details

Meta Data

91.26%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	10
1	8
2	10
3	10
4	10
5	10
6	10
7	10

created_at	"2025-11-18T23:51:53.703267+00:00" 11/18/2025, 11:51:53 PM
model	"google/gemini-2.5-pro"
app_id	182717
external_user	(null)
streamed	true
cancelled	false
latency	2159
moderation_latency	(null)
generation_time	11690
tokens_prompt	42
tokens_completion	583
native_tokens_prompt	38
native_tokens_completion	1282
native_tokens_completion_images	0
native_tokens_reasoning	1181
native_tokens_cached	0
num_media_prompt	(null)
num_input_audio_prompt	(null)
num_media_completion	0
num_search_results	(null)
origin	"https://ncbench.com/"
is_byok	false
finish_reason	"stop"
native_finish_reason	"STOP"
usage	0.0128675
api_type	"completions"
id	"gen-1763509901-2xuPpiLGz38xs7c4UJ8G"
upstream_id	(null)
total_cost	0.0128675
cache_discount	(null)
upstream_inference_cost	0
provider_name	"Google AI Studio"