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Run: 2026-09-02-01M1HJC7V5XZG62ZYQ39J50ET1
Run Details
Model:
Gemini 3.8 Flash (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.0s
Cost:
$0.010326
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
The grandfather clock struck midnight with a hollow chime as heavy autumn rain battered against the dark, shuttered library windows. Lord Harrington lay motionless across his mahogany desk, a silver letter opener protruding sharply from his ornate, embroidered velvet waistcoat. Dark crimson blood dripped slowly onto the Persian rug below, pooling around a shattered crystal glass of vintage French brandy. Standing frozen in the doorway, the butler dropped his heavy brass candelabra, watching the flickering flames die upon the floor. Beside that limp, lifeless hand, an unburned scrap of scorched paper revealed only three cryptic numbers written in black charcoal.
created_at
"2026-09-02T17:23:57.958Z"
9/2/2026, 5:23:57 PM
model
"google/gemini-3.8-flash-20260902"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2687
moderation_latency
(null)
generation_time
9839
tokens_prompt
46
tokens_completion
986
native_tokens_prompt
38
native_tokens_completion
2746
native_tokens_completion_images
0
native_tokens_reasoning
2628
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
0.010326
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788369837-E4LhgDvZDeXTdb7Kj5N2"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788369837-HREyHIhNtYxF8BrPp8I0"
upstream_id
"rluYapDBBuet_PUP9_-oyA8"
provider_responses
0
endpoint_id
"d376f781-516d-42f9-936d-46f19abca6cc"
id
"rluYapDBBuet_PUP9_-oyA8"
is_byok
false
latency
2687
model_permaslug
"google/gemini-3.8-flash-20260902"
provider_name
"Google AI Studio"
status
200
total_cost
0.010326
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