Run: 2026-09-02-01M1HJF3FKQR2848SF72CJPQS3

Run Details

Model:
Gemini 3.8 Flash (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.5s
Cost:
$0.005811
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Heavy rain lashed against the tall windows of Blackwood Manor. Detective Vance stepped carefully over the puddle of fresh blood. Lord Harrington lay sprawled across the ornate mahogany study desk. A silver letter opener remained buried deep inside his chest. Curiously, both of his frozen hands gripped a torn photograph. The grandfather clock in the corner struck midnight with sorrow. Footsteps echoed softly from the shadows outside the locked room.
created_at"2026-09-02T17:25:31.771Z" 9/2/2026, 5:25:31 PM
model"google/gemini-3.8-flash-20260902"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2775
moderation_latency(null)
generation_time6495
tokens_prompt46
tokens_completion514
native_tokens_prompt38
native_tokens_completion1542
native_tokens_completion_images0
native_tokens_reasoning1461
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"STOP"
service_tier"default"
usage0.005811
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer(null)
request_id"req-1788369931-2n76mIpPb07m06cgnrYA"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1788369931-bGfEvhEliPpnNGIewOUA"
upstream_id"C1yYaoPJM4HrjMcP47Gf4AU"
provider_responses
0
endpoint_id"d376f781-516d-42f9-936d-46f19abca6cc"
id"C1yYaoPJM4HrjMcP47Gf4AU"
is_byokfalse
latency2775
model_permaslug"google/gemini-3.8-flash-20260902"
provider_name"Google AI Studio"
status200
total_cost0.005811
cache_discount(null)
upstream_inference_cost0
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
neededCleanfalse
sentences7
wordCounts
010
110
210
310
410
510
610