Run: 2026-04-25-01KQ2HKCYKTZ1JMA01D3GVVH5E

Run Details

Model:
DeepSeek V4 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.4s
Cost:
$0.000039
Provider:
DeepSeek

Evaluation summary

Score Evaluator
Details Link
20.23% 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 rain slicked cobblestones gleamed under the flickering gaslight, casting long shadows across the empty alleyway. A woman's scream pierced the quiet night, then abruptly died into a muffled gurgle. Detective Harding found the body crumpled beside a discarded crate, a single playing card clutched in her cold hand.
created_at"2026-04-25T14:44:49.241Z" 4/25/2026, 2:44:49 PM
model"deepseek/deepseek-v4-flash-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency565
moderation_latency(null)
generation_time2251
tokens_prompt46
tokens_completion140
native_tokens_prompt39
native_tokens_completion121
native_tokens_completion_images(null)
native_tokens_reasoning52
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"
usage0.00003934
router(null)
provider_responses
0
endpoint_id"722e0746-2034-4d6e-a08f-e6271849ee9e"
id"674af686-ae7c-401a-876e-dab5a15477c1"
is_byokfalse
latency284
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-1777128289-PTAd3kxRQCunu2xmBXsH"
session_id(null)
api_type"completions"
id"gen-1777128289-aDcSSShbOm33LlkdVWtn"
upstream_id"674af686-ae7c-401a-876e-dab5a15477c1"
total_cost0.00003934
cache_discount(null)
upstream_inference_cost0
provider_name"DeepSeek"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
20.23% Matches word count n/a
neededCleanfalse
sentences3
wordCounts
016
114
219