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Run: 2026-09-23-01M36P56X2119CQYMTGWRPSJK1
Run Details
Model:
GPT-6 Luna (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
11.7s
Cost:
$0.000701
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 old observatory's clock stopped, though every other clock in Bellweather continued ticking beneath the storm's relentless rain. Inspector Vale found the astronomer face-down beside the telescope, one hand clenched around a brass key warm from someone's pocket. No window stood open, no footprints crossed the dust, and the locked door remained bolted from the inside all evening. Then Vale noticed the dead man's watch was running backward, its cracked glass reflecting someone standing behind her in silence. She turned, but the observatory held only rainlight, scattered star charts, and a second brass key lying beneath her boot. Outside, the clock began striking thirteen, and Vale understood the astronomer had not been the room's only dead occupant tonight.
created_at
"2026-09-23T08:29:46.793Z"
9/23/2026, 8:29:46 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4235
moderation_latency
(null)
generation_time
11711
tokens_prompt
46
tokens_completion
573
native_tokens_prompt
41
native_tokens_completion
1394
native_tokens_completion_images
0
native_tokens_reasoning
1234
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
0.0007011
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790152186-Q9KgucPClxbyIpaH5r80"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790152186-IdO5kbPWgTeTeQVmLnFV"
upstream_id
"resp_02c7a8aa706ff03a016ab38dfae1ec87d1994fd067cf995309"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_02c7a8aa706ff03a016ab38dfae1ec87d1994fd067cf995309"
is_byok
false
latency
1013
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0007011
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
6
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20