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Run: 2026-09-23-01M36P2J7BEBF9CQ2P23R7C9XN
Run Details
Model:
GPT-6 Luna (Reasoning, Medium)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
26.8s
Cost:
$0.001006
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 lighthouse clock stopped, though witnesses swore its hands moved when Captain Vale entered the locked room alone. By dawn, the door remained bolted from within, and Vale lay beside a teacup that smelled faintly of seawater still. Inspector Mara Venn disliked impossible crimes, especially those staged beneath portraits whose eyes seemed to follow her across the room. She found guests waiting in the ballroom, each insisting they had heard the clock strike thirteen before lights went out. Only the housekeeper kept silent, clutching a wet matchbox and watching carefully the inspector's reflection instead of the inspector herself. On the mantel, beside the stopped clock, Mara noticed a fresh fingerprint pressed into the dust, pointing toward the window. Outside, waves battered the cliffs, while inside, someone whispered her name through the locked door in a familiar voice again.
created_at
"2026-09-23T08:28:20.081Z"
9/23/2026, 8:28:20 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
20868
moderation_latency
(null)
generation_time
26752
tokens_prompt
46
tokens_completion
345
native_tokens_prompt
41
native_tokens_completion
2003
native_tokens_completion_images
0
native_tokens_reasoning
1820
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
0.0010056
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790152100-OjVtL9VyUHSNAYtkOgJW"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790152100-qwKw3WORK3RfA1pddA1V"
upstream_id
"resp_074fd8ce64b5ad84016ab38da431a887d188e289f7a0f1cb55"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_074fd8ce64b5ad84016ab38da431a887d188e289f7a0f1cb55"
is_byok
false
latency
788
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0010056
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20