Run: 2026-04-25-01KQ2JGHQX60S6P9HJTRPFHW7P

Run Details

Model:
DeepSeek V4 Flash (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.0s
Cost:
$0.000049
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 rain-slicked cobblestones reflected the gaslight as Detective Hart stepped from his carriage. A single, sharp scream had shattered the quiet of the sleeping town just past midnight. Now, before him, the grand library’s oak doors stood ajar, leaking warmth and lamplight. Inside, a body lay sprawled before the hearth, a letter opener protruding from its chest. The only witness, a terrified maid, clutched a silver tray and whispered of shadows. Hart knelt by the corpse, noting the empty glass and the faint scent of almonds.
created_at"2026-04-25T15:00:44.417Z" 4/25/2026, 3:00:44 PM
model"deepseek/deepseek-v4-flash-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency572
moderation_latency(null)
generation_time2929
tokens_prompt46
tokens_completion180
native_tokens_prompt39
native_tokens_completion157
native_tokens_completion_images(null)
native_tokens_reasoning37
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"
usage0.00004942
router(null)
provider_responses
0
endpoint_id"722e0746-2034-4d6e-a08f-e6271849ee9e"
id"a9d82bd3-6c40-409f-88b5-e67bcb60492e"
is_byokfalse
latency271
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-1777129244-alHWKE8iEZJd64QvaiY1"
session_id(null)
api_type"completions"
id"gen-1777129244-n3VszEXLNeAjzp7yNozH"
upstream_id"a9d82bd3-6c40-409f-88b5-e67bcb60492e"
total_cost0.00004942
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
sentences6
wordCounts
013
115
214
315
414
515