NC Bench
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Run: 2026-02-25-01KJ9588JEPCGQ9VMYZDG5BKFM
Run Details
Model:
Gemini 2.5 Flash Lite (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
5.9s
Cost:
$0.000594
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
9.98%
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 grand ballroom lay eerily silent, a stark contrast to its usual vibrant Saturday evening revelries and laughter. Policemen moved with almost supernatural quietness amidst the shattered crystal glassware scattered across the polished mahogany floor. A single, ornate candelabra had been violently overturned near the dark, sprawling, lifeless form of the unfortunate host. Detective Inspector Harding surveyed the macabre scene with eyes that had witnessed countless tragedies unfold before tonight. Crimson stained the antique Persian rug beneath the fallen figure, a stark, disturbing splash of vibrant, ghastly color. A chilling draft snaked through the vast, opulent room, carrying faint whispers of a terrible, unspeakable secret untold. The air hung thick with the metallic tang of fresh blood and an unsettling, profound sense of dread.
created_at
"2026-02-25T01:05:13.301Z"
2/25/2026, 1:05:13 AM
model
"google/gemini-2.5-flash-lite"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
905
moderation_latency
(null)
generation_time
5848
tokens_prompt
46
tokens_completion
1062
native_tokens_prompt
38
native_tokens_completion
1476
native_tokens_completion_images
0
native_tokens_reasoning
1321
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
0.0005942
router
(null)
provider_responses
0
endpoint_id
"ce839073-aa24-4f29-8358-15b319bd05ec"
is_byok
false
latency
905
model_permaslug
"google/gemini-2.5-flash-lite"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981513-jLDil3Vq9l7DB6lU3rjA"
upstream_id
(null)
total_cost
0.0005942
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
9.98%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
18
1
17
2
18
3
17
4
18
5
18
6
18