NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-10-27-01M5YH5CKN4QQJYQS5DX5Y61MR
Run Details
Model:
Kimi K3.1 Pro (Reasoning, Max)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1m 51s
Cost:
$0.041480
Provider:
Moonshot AI
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 rain stopped at midnight, leaving Blackwood House shining beneath the moon, while its master lay dead inside the study. Detective Mara Venn arrived to find six guests silent in the hall, each avoiding her eyes and the grand staircase. Above them, a clock struck once, though every witness swore the mechanism had been broken for twenty years until now. The study door remained locked from within, and beside the body waited an empty glass smelling faintly of bitter almonds. No window stood open, no chimney offered passage, and the only key still rested deep inside the victim's waistcoat pocket. Mara photographed the room, then noticed fresh ink beneath one fingernail and a paper cut across his own left thumb. On the desk, an unfinished letter named one guest as a thief, a traitor, and the killer among them all. One line had been sliced from the page, leaving a date, three violet words, and no signature anywhere at all. Mara read those words twice, then turned toward the guests as the clock struck a second impossible time behind her. Before Mara could speak, every candle died, and a seventh set of footsteps began slowly descending the staircase above them.
created_at
"2026-10-27T11:15:39.776Z"
10/27/2026, 11:15:39 AM
model
"moonshotai/kimi-k3.1-pro-20261023"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1730
moderation_latency
(null)
generation_time
111432
tokens_prompt
46
tokens_completion
4224
native_tokens_prompt
120
native_tokens_completion
4124
native_tokens_completion_images
(null)
native_tokens_reasoning
3872
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
0.04148
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.22.1; linux; x64))"
http_referer
(null)
request_id
"req-1793099739-ZyuKRc1L0EHJdJ7cE3kh"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1793099739-HTGcOWt6RLvCBV4ACPap"
upstream_id
"chatcmpl-6ae087dcbe599f3ecd49bd8d"
provider_responses
0
endpoint_id
"a3fafaac-f097-4ef1-86b3-842854dad5c6"
id
"chatcmpl-6ae087dcbe599f3ecd49bd8d"
is_byok
false
latency
1730
model_permaslug
"moonshotai/kimi-k3.1-pro-20261023"
provider_name
"Moonshot AI"
status
200
total_cost
0.04148
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Moonshot AI"
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
10
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
20