Run: 2026-04-25-01KQ2HSSYWBWZZ29M30FXFQ7KH

Run Details

Model:
DeepSeek V4 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.2s
Cost:
$0.000045
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
0.00% 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
The grandfather clock's pendulum swung, marking midnight in the silent, cavernous library. A single, blood-stained glove lay crumpled beside the cold, marble fireplace. Lord Eddington's body sprawled across the Persian rug, his eyes fixed on eternity. A shattered crystal decanter leaked its final drops of amber liquid onto the floor. The only sound was the wind moaning through a slightly ajar, latticed window.
created_at"2026-04-25T14:48:19.169Z" 4/25/2026, 2:48:19 PM
model"deepseek/deepseek-v4-flash-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency943
moderation_latency(null)
generation_time3094
tokens_prompt46
tokens_completion163
native_tokens_prompt39
native_tokens_completion142
native_tokens_completion_images(null)
native_tokens_reasoning53
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"
usage0.00004522
router(null)
provider_responses
0
endpoint_id"722e0746-2034-4d6e-a08f-e6271849ee9e"
id"d50b739c-dc08-4575-b298-aa0871067bc6"
is_byokfalse
latency409
model_permaslug"deepseek/deepseek-v4-flash-20260423"
provider_name"DeepSeek"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777128499-V9qGolvaeLG1oGK3RD4V"
session_id(null)
api_type"completions"
id"gen-1777128499-Syyut80HlG9EZt3MbQUU"
upstream_id"d50b739c-dc08-4575-b298-aa0871067bc6"
total_cost0.00004522
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
012
111
213
314
413