Run: 2026-09-02-01M1HH9CP3H07PWQM854Y8SP5P

Run Details

Model:
Gemini 3.8 Flash (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
3.0s
Cost:
$0.003268
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain lashed against the window. Lord Blackwood lay quite still. Deep crimson pooled below him. His silver watch clicked softly. The grandfather clock struck midnight. A shadow fled the terrace. Muddy footprints marked the rug. Detective Vance opened the door. He surveyed the ruined study. Cold wind blew candles out. Nobody heard the fatal shot. The killer was still inside.
created_at"2026-09-02T17:04:56.012Z" 9/2/2026, 5:04:56 PM
model"google/gemini-3.8-flash-20260902"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1214
moderation_latency(null)
generation_time3003
tokens_prompt46
tokens_completion252
native_tokens_prompt37
native_tokens_completion864
native_tokens_completion_images0
native_tokens_reasoning790
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"
usage0.00326775
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer(null)
request_id"req-1788368696-peoQFCLvHGYTJHqPDiqE"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1788368696-uigOzhs8WDNo11tRdWKH"
upstream_id"OFeYarfUBKyb_uMP-4PkiQ8"
provider_responses
0
endpoint_id"d376f781-516d-42f9-936d-46f19abca6cc"
id"OFeYarfUBKyb_uMP-4PkiQ8"
is_byokfalse
latency1214
model_permaslug"google/gemini-3.8-flash-20260902"
provider_name"Google AI Studio"
status200
total_cost0.00326775
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
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115