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Run: 2026-09-23-01M36NQDY23P4VH6J1FWZSGABF
Run Details
Model:
GPT-6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.4s
Cost:
$0.000066
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
66.97%
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, Inspector Vale entered the library, where a shattered window framed the storm and the old clock had stopped. Lady Ashcombe lay beside the fireplace, one gloved hand clutching a silver key, while rain whispered against the curtains. Every guest remained upstairs, or so the butler insisted, though fresh footprints crossed the rug and vanished beneath the desk. Vale studied the untouched brandy, the overturned chessboard, and a single red thread caught on the victim’s wedding ring. Then the clock chimed thirteen, and someone locked the library door from the other side, trapping them together.
created_at
"2026-09-23T08:22:15.242Z"
9/23/2026, 8:22:15 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1993
moderation_latency
(null)
generation_time
3326
tokens_prompt
46
tokens_completion
156
native_tokens_prompt
41
native_tokens_completion
123
native_tokens_completion_images
0
native_tokens_reasoning
0
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
0.0000656
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790151735-XWIMdQOnDvdyPPgkRPJ1"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790151735-ki3XK5SQINTsDewcCO73"
upstream_id
"resp_0c06a2f5bd030de1016ab38c375a0887d1806ef20908148b4c"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_0c06a2f5bd030de1016ab38c375a0887d1806ef20908148b4c"
is_byok
false
latency
366
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0000656
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
66.97%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
19
2
20
3
19
4
18