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Run: 2026-09-02-01M1HJNCB069EAWSXJ8CWW9FCW
Run Details
Model:
Gemini 3.8 Flash (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.6s
Cost:
$0.007937
Provider:
Google AI Studio
Evaluation summary
Score
Evaluator
Details Link
100.00%
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
Thunder rattled the stained glass windows of Blackwood Manor while cold autumn rain lashed violently against the ancient stone walls. Inside the shadowy library, Lord Harrington slumped lifeless across his mahogany desk, crimson blood dripping onto an unfinished last will. A heavy silver letter opener protruded sharply from his velvet coat, gleaming menacingly under the flickering glow of dying embers. The trembling butler dropped his polished tea tray, gasping in sheer horror as shattered porcelain scattered across the Persian rug. Behind him, the heavy oak door clicked shut abruptly, leaving six terrified guests trapped in darkness with a cunning killer.
created_at
"2026-09-02T17:28:57.448Z"
9/2/2026, 5:28:57 PM
model
"google/gemini-3.8-flash-20260902"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1425
moderation_latency
(null)
generation_time
6548
tokens_prompt
46
tokens_completion
787
native_tokens_prompt
38
native_tokens_completion
2109
native_tokens_completion_images
0
native_tokens_reasoning
1994
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"STOP"
service_tier
"default"
usage
0.00793725
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788370137-T0R3FGHEhubVqEe84MPi"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788370137-LvrqIdJuQS4cELjd1MM8"
upstream_id
"2VyYarGQIeSN_PUP2q3TUA"
provider_responses
0
endpoint_id
"d376f781-516d-42f9-936d-46f19abca6cc"
id
"2VyYarGQIeSN_PUP2q3TUA"
is_byok
false
latency
1425
model_permaslug
"google/gemini-3.8-flash-20260902"
provider_name
"Google AI Studio"
status
200
total_cost
0.00793725
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Google AI Studio"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
20
4
20