NC Bench
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Run: 2026-02-25-01KJ95H7A8BZSDEHY16SB4DR47
Run Details
Model:
Gemini 2.5 Flash Lite (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.9s
Cost:
$0.000450
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
52.19%
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
Messages
Meta
AI
The ancient grandfather clock chimed midnight, its mournful resonance echoing through the deserted, dusty halls of Blackwood Manor. Detective Miles Corbin, draped in his usual trench coat, tiptoed cautiously across the Persian rug towards the darkened study door. A faint, metallic scent, distinctly out of place, pricked his nostrils as he slowly pushed the heavy oak inward. The flickering gaslight cast long, dancing shadows across the room, grotesquely distorting familiar objects into monstrous shapes before his eyes. There upon the ornate mahogany desk, slumped amidst scattered papers, lay the lifeless form of Lord Harrington, terribly still. His eyes, wide with a silent, unseeing terror, stared blankly at the intricately carved cherubs adorning the ceiling above. A single crimson stain bloomed upon the front of his crisp, white evening shirt, a starkly obvious wound now. No signs of struggle were immediately apparent, making the sudden, violent end profoundly puzzling for the seasoned detective. The room itself held its breath, guarding secrets whispered only within its opulent, unforgiving, silent walls.
created_at
"2026-02-25T01:10:06.927Z"
2/25/2026, 1:10:06 AM
model
"google/gemini-2.5-flash-lite"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
988
moderation_latency
(null)
generation_time
4868
tokens_prompt
46
tokens_completion
1058
native_tokens_prompt
38
native_tokens_completion
1116
native_tokens_completion_images
0
native_tokens_reasoning
895
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
0.0004502
router
(null)
provider_responses
0
endpoint_id
"ce839073-aa24-4f29-8358-15b319bd05ec"
is_byok
false
latency
988
model_permaslug
"google/gemini-2.5-flash-lite"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981806-0POMr3SNiAgJMYUxBYUu"
upstream_id
(null)
total_cost
0.0004502
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
52.19%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
18
1
20
2
19
3
20
4
19
5
19
6
19
7
18
8
16