Run: 2026-09-10-01M25DF9HY3GCNS8839XD8ZGH4

Run Details

Duration:
13.2s
Cost:
$0.001943
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
92.86% 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 rain fell hard against the old Blackwood mansion windows. Inside, Detective Mara Voss stood beside a freshly covered body. A silver letter opener protruded from the victim's pale chest. The butler claimed he discovered the body exactly at midnight. Seven guests waited in the library, none willing to speak. Detective Voss noticed muddy footprints leading toward the locked conservatory. A broken pocket watch lay beneath the marble fireplace mantle. Someone had wiped the bloody weapon with a silk handkerchief. The storm had knocked out power before the murder occurred. Now only candlelight revealed the liar among the frightened guests. Detective Voss asked, "Which one of you owns this watch?" A woman in red gasped, then stepped back very quickly. The killer smiled because nobody had noticed the missing clock. It was only eight minutes slow, proving the true time. Voss calmly locked the library doors and began her interrogation.
created_at"2026-09-10T10:23:03.746Z" 9/10/2026, 10:23:03 AM
model"deepseek/deepseek-v4.1-flash-20260910"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency681
moderation_latency(null)
generation_time13135
tokens_prompt46
tokens_completion3292
native_tokens_prompt65
native_tokens_completion3222
native_tokens_completion_images(null)
native_tokens_reasoning3039
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)
usage0.00194295
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1789035783-uUtjQyAb9qfGv0Je2R0K"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1789035783-CNMLo5u220NPcxUM2vfQ"
upstream_id"d9c854c0-b71a-4958-af40-3b86f74f3b8f"
provider_responses
0
endpoint_id"fd104bc8-535a-4d31-a847-a8e402e86a02"
id"d9c854c0-b71a-4958-af40-3b86f74f3b8f"
is_byokfalse
latency370
model_permaslug"deepseek/deepseek-v4.1-flash-20260910"
provider_name"DeepSeek"
status200
total_cost0.00194295
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
92.86% Matches word count n/a
neededCleanfalse
sentences14
wordCounts
010
110
210
310
410
510
610
710
810
910
1020
1110
1210
1310