Run: 2026-09-10-01M25DFB1WYDJK19NG6ZQDEPS2

Run Details

Model:
DeepSeek V4.1 Flash (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.5s
Cost:
$0.000950
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
88.89% 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
Rain hammered the mansion windows as the clock struck midnight. Inside, Lord Ashcroft lay dead upon the library's Persian rug. A silver dagger protruded from his chest, its handle gleaming. Detective Mara Voss arrived before police could contaminate the scene. She studied the body while thunder shook the dusty shelves. The locked study door had been bolted from the inside. Yet no weapon remained, and no footprints marked the floor. A single wine glass sat beside a note reading "Sorry." Mara heard a hidden floorboard creak somewhere above her head. The killer, she realized, was still inside this locked mansion.
created_at"2026-09-10T10:23:05.282Z" 9/10/2026, 10:23:05 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency591
moderation_latency(null)
generation_time6440
tokens_prompt46
tokens_completion1585
native_tokens_prompt65
native_tokens_completion1567
native_tokens_completion_images(null)
native_tokens_reasoning1440
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(null)
usage0.00094995
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789035785-gUXdiD1DonG3xiTgWNol"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789035785-sUUyIuci0E9WaQJ6Ox2b"
upstream_id"d9a2e7d8-a61b-4429-a5cb-4fb8ca3e0662"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"d9a2e7d8-a61b-4429-a5cb-4fb8ca3e0662"
is_byokfalse
latency333
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00094995
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
88.89% Matches word count n/a
neededCleanfalse
sentences9
wordCounts
010
110
210
310
410
510
610
720
810