NC Bench
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Run: 2026-02-25-01KJ94XN71QCD528JKTCPJCC7Z
Run Details
Model:
Gemini 2.5 Flash Lite (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
5.6s
Cost:
$0.000628
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
13.17%
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 old manor house loomed silently under a sky choked with bruised, swirling clouds presaging a storm. Detective Harding's polished shoe crunched on the gravel drive, its worn leather reflecting the faint, dying light. A single, uncannily bright light spilled from an upstairs window, a stark beacon in the encroaching darkness. Constable Davies had called him, his voice tight with an urgency that chilled Harding to the very bone. The grand oak door stood ajar, revealing a sliver of the dimly lit, opulent foyer within its frame. An unsettling silence hung heavy in the air, thicker than the dust motes dancing in the lamp’s faint glow. Near the grand staircase, a dark, irregular stain marred the Persian rug, impossibly vibrant against the aged threads. Lord Ashworth lay sprawled awkwardly, his silk dressing gown splayed open, revealing a shocking, final stillness. A peculiar, antique letter opener rested beside his outstretched hand, its ornate handle glinting ominously in the gloom. Harding knelt slowly, his trained eyes scanning every detail, absorbing the scene before a single word was spoken.
created_at
"2026-02-25T00:59:25.802Z"
2/25/2026, 12:59:25 AM
model
"google/gemini-2.5-flash-lite"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1267
moderation_latency
(null)
generation_time
5551
tokens_prompt
46
tokens_completion
896
native_tokens_prompt
38
native_tokens_completion
1560
native_tokens_completion_images
0
native_tokens_reasoning
1341
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
0.0006278
router
(null)
provider_responses
0
endpoint_id
"ce839073-aa24-4f29-8358-15b319bd05ec"
is_byok
false
latency
1267
model_permaslug
"google/gemini-2.5-flash-lite"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981165-vxtSRpZh59BnOOSjafbT"
upstream_id
(null)
total_cost
0.0006278
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
13.17%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
17
1
17
2
17
3
18
4
18
5
19
6
18
7
16
8
18
9
18