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Run: 2026-02-25-01KJ9559W31DQQQFBJ3T16V8MK
Run Details
Model:
Gemini 2.5 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.1s
Cost:
$0.002701
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
65.22%
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 old manor loomed, silhouetted against a bruised sky. Rain lashed windows, mournfully drumming a relentless, chilling rhythm. Reginald “Reggie” Finch shivered, pulling his worn coat tighter. He hated these late-night calls to Lord Ashworth. The heavy oak door creaked open, uninvited, unlocked. A draft, icy and unwelcome, swept through the hall. Reggie stepped inside, heart thumping an uneasy cadence. Darkness clung everywhere, swallowing all familiar shapes whole. Then he saw it, slumped beside a grand armchair. Lord Ashworth lay still, blood staining his white shirt crimson. A priceless ancient letter opener rested firmly within his chest. Reggie gasped, the horrific sight stealing his very breath. Silent terror gripped him fast, a cold, hard fist. He knew immediately: a terrible, calculated murder had occurred.
created_at
"2026-02-25T01:03:36.33Z"
2/25/2026, 1:03:36 AM
model
"google/gemini-2.5-flash"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1252
moderation_latency
(null)
generation_time
5059
tokens_prompt
46
tokens_completion
588
native_tokens_prompt
38
native_tokens_completion
1076
native_tokens_completion_images
0
native_tokens_reasoning
910
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
0.0027014
router
(null)
provider_responses
0
endpoint_id
"16c01e26-9b91-4d22-b487-ed35634b017d"
is_byok
false
latency
1252
model_permaslug
"google/gemini-2.5-flash"
provider_name
"Google AI Studio"
status
200
api_type
"completions"
id
"gen-1771981416-aultD2AB8qw7Xxg1SOHi"
upstream_id
(null)
total_cost
0.0027014
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
Evaluation details
Result
Evaluator
Details
Meta Data
65.22%
Matches word count
n/a
neededClean
false
sentences
14
wordCounts
0
9
1
9
2
9
3
8
4
8
5
9
6
8
7
8
8
9
9
10
10
10
11
9
12
9
13
9