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Run: 2026-09-03-01M1KYCH821PH3E4WCQ8RNXA5C
Run Details
Model:
Hy4 Preview (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
4m 2s
Cost:
$0.045545
Provider:
Tencent
Evaluation summary
Score
Evaluator
Details Link
100.00%
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
Messages
Meta
AI
The old grandfather clock in the dark hallway had just finished slowly striking midnight when the lights suddenly went out. Outside, the cold wind howled through the bare old trees and rain lashed against the tall windows of Ravenwood Manor. Detective Eleanor Vance stood in the grand empty foyer, shaking water from her coat as thunder rolled above the house. She had been summoned to the remote estate by a frantic telephone call from the manor's owner, Mister Alistair Gray. The message had been brief and very strange, warning of a terrible crime that would happen before the night ended. A nervous butler with trembling hands led her down a long corridor filled with many old portraits of stern ancestors. He stopped before a heavy oak door and whispered that the master was anxiously waiting inside with the other guests. Eleanor pushed the door open and stepped into a warm lamplit room where several tense faces slowly turned toward her. In the center of the room, a crystal chandelier cast flickering light across a Persian rug and a small table. Upon that table lay an open leather ledger, a silver candlestick, and a glass half full of deep red wine. But it was the motionless figure slumped in the tall wooden chair beside the fireplace that held everyone's terrified attention. Alistair Gray sat motionless with his head tilted strangely back, a single crimson wound marking his cold pale waxen forehead. There was very little blood on his snowy shirtfront, yet the room felt heavy with sudden unspoken fear and suspicion. Five guests sat frozen around the dim room, their eyes nervously darting from the body to one another in silence. Eleanor recognized the local doctor, a famous young actress, a retired colonel, and a very quiet nervous lawyer among them. She stepped closer to the body and asked in a calm voice who had found him in exactly that way. The doctor cleared his own throat nervously and said that he had discovered the body only minutes before her arrival. The colonel loudly protested that all the heavy doors had been locked from the inside since early dinner was served. Eleanor noticed a small smear of blood on the dead man's cuff and a torn note in his clenched hand. She looked at the frightened faces around her and knew that a long, dark, dangerous night had already truly begun.
created_at
"2026-09-03T15:32:19.344Z"
9/3/2026, 3:32:19 PM
model
"tencent/hy4-preview-20260827"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1544
moderation_latency
(null)
generation_time
241695
tokens_prompt
46
tokens_completion
16560
native_tokens_prompt
56
native_tokens_completion
18192
native_tokens_completion_images
(null)
native_tokens_reasoning
17710
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"
service_tier
(null)
usage
0.045544896
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.19.0; linux; x64))"
http_referer
(null)
request_id
"req-1788449539-chidamSdd9WoSF8kNPbB"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1788449539-8yc3kHDSqSBhFM16nCSc"
upstream_id
"093c5b73-d228-4c2b-acc1-40c44c8f944a"
provider_responses
0
endpoint_id
"ad2a4093-3d2a-41d9-adf1-8b499ac8445d"
id
"093c5b73-d228-4c2b-acc1-40c44c8f944a"
is_byok
false
latency
1544
model_permaslug
"tencent/hy4-preview-20260827"
provider_name
"Tencent"
status
200
total_cost
0.045544896
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Tencent"
response_cache_source_id
(null)
data_region
"global"
workspace_id
"97e315e5-d303-487d-83c1-83180e8a13d4"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
20
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20
10
20
11
20
12
20
13
20
14
20
15
20
16
20
17
20
18
20
19
20