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Run: 2026-09-23-01M36NJ8R032W5V04QKCGQHPFV
Run Details
Model:
GPT-6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.4s
Cost:
$0.000061
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
17.77%
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
Detective Mara Venn arrived at Bellweather House as rain silvered the windows and thunder shook dust from the ceiling. Inside, the clock had stopped at midnight, though every witness insisted the murder happened just minutes earlier. Lord Ashcombe lay beneath the staircase, one hand gripping a bloodstained playing card nobody recognized. Mara studied the silent guests, noticing one empty chair, one missing glass, and one door locked from within. Then the dead man’s pocket watch began ticking, although its shattered face contained no hands, only Mara’s initials.
created_at
"2026-09-23T08:19:26.089Z"
9/23/2026, 8:19:26 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1455
moderation_latency
(null)
generation_time
2353
tokens_prompt
46
tokens_completion
147
native_tokens_prompt
41
native_tokens_completion
114
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
0.0000611
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790151566-HkKM4snk35JUTLYK37OO"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790151566-G2dWqZMTtOp6Gpf72fpr"
upstream_id
"resp_02555a27b1151d31016ab38b8e328487d181ef6c220fcb6f2d"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_02555a27b1151d31016ab38b8e328487d181ef6c220fcb6f2d"
is_byok
false
latency
313
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0000611
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
17.77%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
19
1
17
2
15
3
18
4
18