NC Bench
Overview
About
Tests
Models
Vendors
Compare
Run: 2026-02-25-01KJ95HD4KANCB2VTEM1D28MCN
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
4.6s
Cost:
$0.002261
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
70.60%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
The flickering neon sign cast a sickly green glow across the street. Rain pelted the grimy window of the rundown apartment building relentlessly. Detective Harding sighed, running a tired hand through his already disheveled hair. Another late night call, a familiar and unwelcome disturbance had arrived. He pulled his trench coat tighter against the biting November chill. The dispatcher’s voice had been clipped, filled with a grim urgency. Someone discovered a body inside the old abandoned factory just now. Harding knew the place, a notorious haunt for local teenage vandals. He parked his unmarked sedan beside several flashing patrol car lights. Uniformed officers guarded the perimeter, keeping curious onlookers safely away. The crime scene tape shimmered, a stark yellow warning barrier. A rookie officer saluted him, mouth tight with nervous tension. "Inside, sir. It’s not a pretty sight at all," she warned. Harding’s boots crunched on fragments of broken glass and debris. The air hung heavy with the smell of stale damp concrete now. A single bare bulb illuminated the grim discovery unevenly. A woman lay sprawled, her crimson dress a shocking contrast against grimy floor. Her wide, unseeing eyes stared blankly toward the blackened ceiling. No obvious weapon lay nearby, no signs of struggling were evident. Only a meticulously placed white orchid rested upon her pale chest.
created_at
"2026-02-25T01:10:12.889Z"
2/25/2026, 1:10:12 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1043
moderation_latency
(null)
generation_time
4513
tokens_prompt
46
tokens_completion
608
native_tokens_prompt
38
native_tokens_completion
900
native_tokens_completion_images
0
native_tokens_reasoning
631
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
0.0022614
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1043
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981812-ikBT2hm6crFJtSzHXsaQ"
upstream_id
(null)
total_cost
0.0022614
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
70.60%
Matches word count
n/a
neededClean
false
sentences
20
wordCounts
0
12
1
11
2
12
3
11
4
11
5
11
6
11
7
11
8
11
9
10
10
10
11
10
12
11
13
10
14
12
15
9
16
13
17
10
18
11
19
11