Run: 2026-09-10-01M25DZV22V006TXB4KB4872KA

Run Details

Duration:
18.4s
Cost:
$0.002933
Provider:
DeepSeek

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

AI
Rain hammered the mansion windows while Detective Mara Vale stepped through the grand front door, with her soaked coat dripping. A butler with pallid cheeks led her toward the library where the master lay dead beneath a crimson velvet throw. The victim's glassy eyes stared at the ceiling, and a silver letter opener pierced his chest deeply, without any doubt. Mara knelt beside him, noting the faint perfume of lilies and the overturned brandy glass near his pale right hand. The butler claimed he heard nothing, yet mud caked his shoes and his hands trembled when she asked about dinner. A storm sealed every road, trapping everyone inside with a killer among them, waiting for a perfect moment to strike. Mara looked at the locked window, then whispered that the murderer never left this room tonight and she smiled coldly. Outside, thunder cracked as the lights died, leaving Mara alone with a corpse and a liar in the sudden dark.
created_at"2026-09-10T10:32:05.958Z" 9/10/2026, 10:32:05 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency720
moderation_latency(null)
generation_time18319
tokens_prompt46
tokens_completion4945
native_tokens_prompt65
native_tokens_completion4872
native_tokens_completion_images(null)
native_tokens_reasoning4680
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)
usage0.00293295
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789036325-IxNBATXskliHDhT8bsj3"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789036325-vktTCBhBK70qFhBUvskI"
upstream_id"16de8152-acdc-455b-bce1-8c17694a0865"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"16de8152-acdc-455b-bce1-8c17694a0865"
is_byokfalse
latency341
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00293295
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
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720