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Run: 2026-09-23-01M36NWNGCPVW22J2XG3285AA1
Run Details
Model:
GPT-6 Luna (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
14.1s
Cost:
$0.000627
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
At midnight, the bell tower rang though ropes hung motionless. Inspector Vale arrived to find the manor's front door ajar. Inside, every clock had stopped at precisely eleven seventeen sharp. Lord Ashcombe lay beneath the staircase, one hand clenched tightly. Beside him, a silver key gleamed in a dark puddle. No window stood open, and no footprints crossed the snow. Yet someone had left a wet umbrella beside the fireplace. Vale glanced upstairs, where one door clicked softly shut somewhere. The housekeeper whispered, “He was alone,” then avoided Vale's gaze. Vale noticed fresh mud beneath her own polished black shoes. The murderer, Vale realized, was still somewhere inside the house.
created_at
"2026-09-23T08:25:06.834Z"
9/23/2026, 8:25:06 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
13266
moderation_latency
(null)
generation_time
14048
tokens_prompt
46
tokens_completion
182
native_tokens_prompt
41
native_tokens_completion
1246
native_tokens_completion_images
0
native_tokens_reasoning
1088
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
0.0006271
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790151906-uFgEy80szYrsZP0JxE6A"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790151906-prFL04aL7VPgHAE82imX"
upstream_id
"resp_01694f280d11f67f016ab38ce2eba087d1a540741217f94cd3"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_01694f280d11f67f016ab38ce2eba087d1a540741217f94cd3"
is_byok
false
latency
344
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0006271
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
11
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10