Run: 2026-09-10-01M25DFZM008DNQ9C7S6NQF4YR

Run Details

Duration:
10.1s
Cost:
$0.001552
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
84.62% 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
The cold rain tapped softly against the tall library windows. Inside, a grandfather clock counted each heavy, silent, lonely second. Lord Ashcroft sat slumped in his favorite leather chair, unmoving. A silver letter opener glinted deep within his cold chest. Dark blood soaked his white shirt and the Persian rug. The heavy library door stood locked from the inside tonight. No footprints marked the dusty floor, no weapon lay nearby. A single candle still burned beside an empty crystal glass. On the desk, a note read, "Meet me at midnight." The clock struck twelve, and someone knocked twice outside then. Detective Mira Vale arrived then, shaking rain from her coat. She saw the body, and her sharp breath caught hard. "Whoever did this," she whispered, "never left through that door." Outside, the storm swallowed every other sound in town tonight. The killer was already planning another perfect, quiet, final crime.
created_at"2026-09-10T10:23:26.342Z" 9/10/2026, 10:23:26 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency762
moderation_latency(null)
generation_time10057
tokens_prompt46
tokens_completion2577
native_tokens_prompt65
native_tokens_completion2570
native_tokens_completion_images(null)
native_tokens_reasoning2382
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)
usage0.00155175
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789035806-wc4y6RheAYAVcNH2AYLh"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789035806-zY3KhoTA7VKhd9IbbLar"
upstream_id"3d6e69ac-7bbe-4763-88ec-4e7315d1be96"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"3d6e69ac-7bbe-4763-88ec-4e7315d1be96"
is_byokfalse
latency355
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00155175
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
84.62% Matches word count n/a
neededCleanfalse
sentences13
wordCounts
010
110
210
310
410
510
610
710
820
910
1010
1120
1210