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Run: 2026-09-23-01M36R425Y32TNVTDM12N0AJDG
Run Details
Model:
GPT-6 Luna (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
31.8s
Cost:
$0.001703
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 manor’s west clock stopped, while every other timepiece continued ticking beneath the storm that battered the windows. In the library, Inspector Vale found Sir Alistair Crowe facedown beside an overturned glass and a perfectly dry, unlit fireplace. His silver cufflinks were missing, but muddy footprints toward the locked conservatory matched none of the shoes worn by guests. Every witness claimed the doors had stayed bolted, yet a fresh rose lay crushed beneath the dead man’s open hand. Vale lifted it carefully, noticing black soil packed between the petals and smelling bitter almonds beneath the room’s usual polish. Then the housekeeper whispered that roses never grew here, and Vale noticed her muddy hem bore marks matching the prints. Before he could question her, the west clock chimed once, and every candle in the library guttered out without warning. In the sudden darkness, someone pressed a cold object into Vale’s palm, then disappeared while servants screamed loudly behind him.
created_at
"2026-09-23T09:04:06.347Z"
9/23/2026, 9:04:06 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
16241
moderation_latency
(null)
generation_time
31758
tokens_prompt
46
tokens_completion
645
native_tokens_prompt
41
native_tokens_completion
3397
native_tokens_completion_images
0
native_tokens_reasoning
3188
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
0.0017026
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790154246-aNjFyT1A4KF99XwXMAZe"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790154246-WeuLB6wzRWEchp8xk9FW"
upstream_id
"resp_0920f64b1722dbf5016ab39606789887d18ff20ff277d115a7"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_0920f64b1722dbf5016ab39606789887d18ff20ff277d115a7"
is_byok
false
latency
1279
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0017026
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