NC Bench
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Run: 2026-02-25-01KJ9583605Y92FNWH423F1NHJ
Run Details
Model:
Gemini 2.5 Flash Lite (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4.4s
Cost:
$0.000502
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
65.02%
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 manor stood silhouetted against a bruised twilight sky, its stone walls whispering forgotten tales of long past nights. Inside the grand library, Sir Reginald lay sprawled beside an overturned emerald inkwell, his eyes staring blankly towards the dusty ceiling. A single, pristine white orchid rested unnaturally upon his chest, an odd and striking detail in this scene of sudden violence. The air hung heavy and still, carrying the faint, lingering scent of expensive brandy mixed with something metallic and distinctly unpleasant. Detective Miles Corbin arrived shortly thereafter, his keen eyes scanning the room, absorbing every detail with practiced, weary deliberation. He stepped carefully over scattered papers and broken glass, noting the peculiar quietness that permeated the otherwise opulent study. A half-finished letter lay on the desk before him, its words trailing off midsentence, hinting at a desperate, hastily interrupted communication. Near the fireplace, a woman's exquisite silk glove lay abandoned, a stark contrast to the grim brutality discovered just moments ago. The clock on the mantelpiece resumed its ticking loudly, the only sound breaking the oppressive silence, marking another moment in time.
created_at
"2026-02-25T01:05:07.785Z"
2/25/2026, 1:05:07 AM
model
"google/gemini-2.5-flash-lite"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
891
moderation_latency
(null)
generation_time
4387
tokens_prompt
46
tokens_completion
807
native_tokens_prompt
38
native_tokens_completion
1246
native_tokens_completion_images
0
native_tokens_reasoning
1026
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
0.0005022
router
(null)
provider_responses
0
endpoint_id
"ce839073-aa24-4f29-8358-15b319bd05ec"
is_byok
false
latency
890
model_permaslug
"google/gemini-2.5-flash-lite"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981507-FBuRPiyCsc4ZAGDLBfY7"
upstream_id
(null)
total_cost
0.0005022
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
65.02%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
20
1
21
2
21
3
21
4
19
5
19
6
21
7
21
8
21