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Run: 2026-09-23-01M36RATYPWAQ3DS6NJ30EX8F2
Run Details
Model:
GPT-6 Luna (Reasoning, High)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
15.0s
Cost:
$0.000789
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 bell above the locked library door rang, though nobody had entered since Lord Ashcombe’s funeral that evening. Inspector Vale found the study window latched, its curtains stirring, and one wet footprint beside the hearth, pressed into dust. On the desk, beneath a toppled glass, lay the host’s final note: TRUST NO ONE WHO ARRIVES AFTER ME TONIGHT. The housekeeper crossed herself when Vale asked who had discovered the body, then whispered, “Everyone, Inspector, except the dead man.” Vale glanced toward the staircase, where six guests waited beneath portraits whose painted eyes seemed fixed upon his bloodstained gloves. Then the library bell rang again, and from upstairs came a seventh set of footsteps, descending quietly toward them, unannounced.
created_at
"2026-09-23T09:07:48.321Z"
9/23/2026, 9:07:48 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3490
moderation_latency
(null)
generation_time
14898
tokens_prompt
46
tokens_completion
762
native_tokens_prompt
41
native_tokens_completion
1570
native_tokens_completion_images
0
native_tokens_reasoning
1409
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
0.0007891
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer
(null)
request_id
"req-1790154468-Bf2bl4NSpvJ6SLqb6ue9"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790154468-o8tTRYTplDsz6sw8KR28"
upstream_id
"resp_02f28594d2c38016016ab396e46a7c87d197fe073ba289cb73"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_02f28594d2c38016016ab396e46a7c87d197fe073ba289cb73"
is_byok
false
latency
669
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0007891
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