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Run: 2026-09-23-01M36NWZG8C9SQQ192AGCSQ8E4
Run Details
Model:
GPT-6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
3.6s
Cost:
$0.000068
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
30.83%
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, Detective Mara Voss found the mayor face down in the fountain, clutching a bloodstained invitation beneath moonlit water. Rain stitched silver threads across the square while the clocktower chimed thirteen, and every window above watched silently. She recognized the dead man’s ring, yet someone had twisted it backward, hiding the family crest from view. Behind her, a child whispered, “He promised nobody would remember,” then vanished into the crowd before Mara turned. The invitation bore tomorrow’s date, her own name, and one sentence written in the mayor’s unmistakable crimson ink.
created_at
"2026-09-23T08:25:17.069Z"
9/23/2026, 8:25:17 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2275
moderation_latency
(null)
generation_time
3569
tokens_prompt
46
tokens_completion
158
native_tokens_prompt
41
native_tokens_completion
127
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
0.0000676
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790151917-ERAne9jHuPEjVfi1dsYZ"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790151917-1KZy3fujN0XF0SOA3Ygu"
upstream_id
"resp_02614d10f0fadde8016ab38ced2f1887d1aca3b0aaa824c5a1"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_02614d10f0fadde8016ab38ced2f1887d1aca3b0aaa824c5a1"
is_byok
false
latency
808
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0000676
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
30.83%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
18
2
18
3
18
4
18