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Run: 2026-09-23-01M36NVM2V9C5CF9W4PF13AKW3
Run Details
Model:
GPT-6 Luna (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
7.0s
Cost:
$0.000304
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 old observatory’s clock struck thirteen, and Inspector Vale found a fresh footprint circling the locked telescope inside. Beyond the rain-streaked windows, snow covered every rooftop, yet the victim’s shoes were dry and dusted with unfamiliar yellow pollen. Vale lifted the dead man’s hand, noticing a brass key clenched there, warm despite the chill and the room’s silence. Then the clock struck once more, though its pendulum hung motionless, and someone whispered Vale’s name from inside the wall.
created_at
"2026-09-23T08:24:32.609Z"
9/23/2026, 8:24:32 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
6571
moderation_latency
(null)
generation_time
6955
tokens_prompt
46
tokens_completion
136
native_tokens_prompt
41
native_tokens_completion
599
native_tokens_completion_images
0
native_tokens_reasoning
487
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
0.0003036
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790151872-tHilfz4d7wkq7VuMcz35"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790151872-TuiCoDwKUylmzO82BAKm"
upstream_id
"resp_09212be5105f87f7016ab38cc0b07c87d19dfb168df861819e"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_09212be5105f87f7016ab38cc0b07c87d19dfb168df861819e"
is_byok
false
latency
820
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0003036
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
4
wordCounts
0
20
1
20
2
20
3
20