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Run: 2026-04-25-01KQ2FRE31FMTXQB3S698ZM58V
Run Details
Model:
DeepSeek V4 Pro (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
8m 50s
Cost:
$0.000251
Provider:
DeepSeek
Evaluation summary
Score
Evaluator
Details Link
0.43%
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
Messages
Meta
AI
The grand estate's library held the stillness of a held breath before a terrible scream. Detective Inspector Ada Cross stepped over the threshold, her keen eyes missing absolutely nothing at all. The body of Lord Pemberton lay crumpled near the cold fireplace, one hand clutching a torn page. A single crystal glass of port rested on the mahogany desk, its deep red contents entirely undisturbed. Outside the tall window, a raven watched silently, its black eye reflecting the grim scene within. The air smelled faintly of cigar smoke, old leather, and the metallic tang of recently spilled blood. Cross noted the clock on the mantel had stopped precisely at eleven forty-seven, its pendulum still. She turned to the trembling butler and asked quietly, "Who else was in the house tonight?"
created_at
"2026-04-25T14:21:18.164Z"
4/25/2026, 2:21:18 PM
model
"deepseek/deepseek-v4-pro-20260423"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1227
moderation_latency
(null)
generation_time
9293
tokens_prompt
46
tokens_completion
329
native_tokens_prompt
39
native_tokens_completion
269
native_tokens_completion_images
(null)
native_tokens_reasoning
101
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.000250995
router
(null)
provider_responses
0
endpoint_id
"d084170b-dd99-4e53-9ae1-b63881f3cfbf"
id
"edfd5d8c-ee32-46f7-b658-62b41c62b15e"
is_byok
false
latency
276
model_permaslug
"deepseek/deepseek-v4-pro-20260423"
provider_name
"DeepSeek"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer
(null)
request_id
"req-1777126878-5poq8f0wrbFxRgYvsLFK"
session_id
(null)
api_type
"completions"
id
"gen-1777126878-zwyNPBL2ToX042zTfFkW"
upstream_id
"edfd5d8c-ee32-46f7-b658-62b41c62b15e"
total_cost
0.000250995
cache_discount
(null)
upstream_inference_cost
0
provider_name
"DeepSeek"
response_cache_source_id
(null)
Evaluation details
Result
Evaluator
Details
Meta Data
0.43%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
15
1
16
2
17
3
17
4
16
5
17
6
16
7
16