NC Bench
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Run: 2026-02-25-01KJ950JSS5MD5NH2KHSQDEYV7
Run Details
Model:
Gemini 2.5 Flash Lite (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.0s
Cost:
$0.000448
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
52.82%
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 storm raged outside the old stone manor, its fury mirroring the sudden unease settling heavily within its darkened halls. Detective Harding cautiously pushed open the heavy oak door, a chilling draft whispering secrets of a tragedy yet undiscovered. A single, flickering gas lamp cast grotesque shadows across the opulent study, illuminating a scene that would forever haunt his troubled mind. Lord Ashworth lay sprawled upon Persian rugs, his normally stern face now frozen in a rictus of unspeakable, sudden terror. A single, ornate letter opener, usually gracing his mahogany desk, now protruded unnaturally from his chest, disturbingly precise. The air hung thick with the scent of expensive cigar smoke and a metallic tang that spoke unmistakably of freshly spilled blood. A shattered glass lay near his lifeless hand, its fragments glinting like shattered dreams under the dim, oppressive lamplight. No forced entry marred the elaborately carved window, suggesting the killer perhaps belonged to the household or was intimately known here.
created_at
"2026-02-25T01:01:01.631Z"
2/25/2026, 1:01:01 AM
model
"google/gemini-2.5-flash-lite"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1167
moderation_latency
(null)
generation_time
5973
tokens_prompt
46
tokens_completion
1297
native_tokens_prompt
38
native_tokens_completion
1110
native_tokens_completion_images
0
native_tokens_reasoning
915
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
0.0004478
router
(null)
provider_responses
0
endpoint_id
"ce839073-aa24-4f29-8358-15b319bd05ec"
is_byok
false
latency
1167
model_permaslug
"google/gemini-2.5-flash-lite"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981261-nFVeenw6SpewF9D32z5I"
upstream_id
(null)
total_cost
0.0004478
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
52.82%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
19
2
22
3
20
4
18
5
22
6
19
7
21