Run: 2026-04-25-01KQ2G9G11DFRS64YYYWK29J1F

Run Details

Duration:
29.1s
Cost:
$0.001240
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
93.44% 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
The thick fog clung to the wet cobblestones like a guilty secret refusing to be forgotten by the pale dawn. Detective Inspector Marlowe pulled his trench coat tighter against the damp chill and quietly surveyed the silent, blood-spattered Victorian parlor. A single overturned crystal glass lay near the grand piano, its dark contents staining the priceless Persian rug deep crimson. The victim, a renowned symphony conductor, was sprawled across the velvet chaise lounge with a silver dagger in his chest. No signs of forced entry troubled the ornate front door, and the tall windows were all securely latched from inside. The air carried the faint scent of jasmine perfume mingled with the sharp metallic tang of freshly spilled blood.
created_at"2026-04-25T14:21:56.134Z" 4/25/2026, 2:21:56 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency872
moderation_latency(null)
generation_time28977
tokens_prompt46
tokens_completion1466
native_tokens_prompt39
native_tokens_completion1406
native_tokens_completion_images(null)
native_tokens_reasoning1264
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"
usage0.001240185
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"200098a0-38c9-4ff3-a866-05954d9c1ec6"
is_byokfalse
latency280
model_permaslug"deepseek/deepseek-v4-pro-20260423"
provider_name"DeepSeek"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777126916-tm9cpQFc3ZStTXMdy1Dm"
session_id(null)
api_type"completions"
id"gen-1777126916-HOrmKM4m2FVN7m307Wau"
upstream_id"200098a0-38c9-4ff3-a866-05954d9c1ec6"
total_cost0.001240185
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
93.44% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
020
120
220
320
420
519