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Run: 2026-09-23-01M36R8B5JX4NVKMKQFWCVHFGF
Run Details
Model:
GPT-6 Luna (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
26.4s
Cost:
$0.001384
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 observatory doors swung open, though everyone in Bellweather knew its keeper had been dead for three hours. Inspector Vale stepped inside, carrying a rain-soaked hat and the uncomfortable certainty that the murderer had waited for him there. The body lay beneath the chart, one hand curled around a silver key belonging to no door in the building. Rain tapped the dome overhead while twelve silent witnesses watched from portraits lining the circular walls above the dusty instruments. Among them, the mayor smiled faintly, though Vale remembered seeing that same expression at the victim’s funeral only last week. A clock struck one, and behind the sealed library door, a disconnected telephone began ringing without warning in the darkness. Nobody moved until the dead keeper’s watch answered from inside Vale’s coat, chiming a melody he had never heard before.
created_at
"2026-09-23T09:06:26.62Z"
9/23/2026, 9:06:26 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
24253
moderation_latency
(null)
generation_time
26331
tokens_prompt
46
tokens_completion
227
native_tokens_prompt
41
native_tokens_completion
2759
native_tokens_completion_images
0
native_tokens_reasoning
2588
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
0.0013836
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790154386-Ka9yiekeRtAILIwwp2Wi"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790154386-nKHY3iDmHQ86mlOz5cTt"
upstream_id
"resp_0d9aff9d2b79f065016ab39692c33887d18fe824928011f024"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_0d9aff9d2b79f065016ab39692c33887d18fe824928011f024"
is_byok
false
latency
972
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0013836
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20