Run: 2026-04-25-01KQ2J2CCE408N15QDQHTVME0H

Run Details

Model:
DeepSeek V4 Pro (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
1m 3s
Cost:
$0.002404
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
88.24% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain blurred the windows. A body sprawled on carpet. Blood seeped into the fibers. A silver knife glinted nearby. She stood in the doorway. Her phone slipped from fingers. "Please call nine-one-one right now." Detective Stone arrived at midnight. He observed the chaotic scene. The victim's eyes were open. A faint smile lingered there. Stone noticed a torn photograph. It lay clutched in hand. The picture showed two people. One face was scratched out. Stone looked at the woman. She avoided his sharp gaze. "Tell me what you saw." Her answer revealed nothing yet.
created_at"2026-04-25T14:53:05.508Z" 4/25/2026, 2:53:05 PM
model"deepseek/deepseek-v4-pro-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1241
moderation_latency(null)
generation_time57980
tokens_prompt46
tokens_completion2540
native_tokens_prompt39
native_tokens_completion2744
native_tokens_completion_images(null)
native_tokens_reasoning2620
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"
usage0.002404245
router(null)
provider_responses
0
endpoint_id"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id"7258b342-624c-40a6-95b0-b3110fcfd173"
is_byokfalse
latency376
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-1777128785-NI2epzPLURiaeDZeEka6"
session_id(null)
api_type"completions"
id"gen-1777128785-iDcWfZz6zaa4Xa8aSXPf"
upstream_id"7258b342-624c-40a6-95b0-b3110fcfd173"
total_cost0.002404245
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
88.24% Matches word count n/a
neededCleanfalse
sentences17
wordCounts
05
15
25
35
45
55
610
75
85
95
105
115
125
135
145
155
1610