NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-09-23-01M36R17BV7SH7F6814QHXQGFF
Run Details
Model:
GPT-6 Luna (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
27.0s
Cost:
$0.001380
Provider:
OpenAI
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
At midnight, the telephone rang inside Blackthorn House, though every wire had been severed after the storm swallowed the village. Inspector Vale arrived before dawn, carrying a damp hat, a silver flask, and the peculiar certainty that someone expected him. The front door stood open, and footprints crossed the hall, stopping beneath a portrait whose eyes someone had scratched away. Lord Ashcombe lay beside his library desk, one hand curled around a key that opened nothing anywhere in the house. No blood marked the carpet, yet the doctor said Ashcombe died from a wound inflicted after his heart had stopped. Around him, relatives gathered in silence: a widow, a nephew, a housekeeper, and a stranger wearing the dead man's ring. Vale recognized the ring immediately: he had buried its owner beneath the lake three winters earlier and then told nobody. Before he could speak, the stranger smiled, and upstairs a clock began striking thirteen, though Blackthorn House had no clocks.
created_at
"2026-09-23T09:02:33.349Z"
9/23/2026, 9:02:33 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
8228
moderation_latency
(null)
generation_time
26818
tokens_prompt
46
tokens_completion
623
native_tokens_prompt
41
native_tokens_completion
2751
native_tokens_completion_images
0
native_tokens_reasoning
2553
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
"completed"
service_tier
"default"
usage
0.0013796
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790154153-WcnFNZyaSz6cGjKn0oqi"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790154153-To0elN7yOqNN9VrWwSnn"
upstream_id
"resp_04ddeb6835f5bbe5016ab395a9796487d1b942b65d89d913bb"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_04ddeb6835f5bbe5016ab395a9796487d1b942b65d89d913bb"
is_byok
false
latency
1223
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0013796
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
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
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20