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Run: 2026-09-23-01M36P50MY7FJMVCAHM45FZG7H
Run Details
Model:
GPT-6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
6.0s
Cost:
$0.000072
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
92.13%
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 Manor just as midnight rain silvered the gravel drive and swallowed the distant road. Inside, every clock had stopped at eleven seventeen, and the guests stood beneath the staircase, whispering around their host’s body. Lord Ashcombe lay beside the unlit fireplace, one hand clenched around a playing card: the queen of hearts, carefully bloodied. Mara surveyed their pale faces, then noticed the servants’ entrance swinging gently open, though no footprints crossed the polished floor. “Someone here,” she said, “has already rehearsed a lie,” while thunder shook dust from the portrait above the mantelpiece.
created_at
"2026-09-23T08:29:40.392Z"
9/23/2026, 8:29:40 AM
model
"openai/gpt-6-luna-20260922"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
4383
moderation_latency
(null)
generation_time
5966
tokens_prompt
46
tokens_completion
172
native_tokens_prompt
41
native_tokens_completion
135
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
0.0000716
router
(null)
user_agent
"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer
(null)
request_id
"req-1790152180-WyFLXGjqPnWEZJEFgWsc"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1790152180-fU7FWbcXFlURkw2KrJKP"
upstream_id
"resp_0943644b3010ec2e016ab38df4890087d1b5bf16ce335ca414"
provider_responses
0
endpoint_id
"05e94e02-b9c2-4bbb-ba55-4082ee9ad687"
id
"resp_0943644b3010ec2e016ab38df4890087d1b5bf16ce335ca414"
is_byok
false
latency
2998
model_permaslug
"openai/gpt-6-luna-20260922"
provider_name
"OpenAI"
status
200
total_cost
0.0000716
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
92.13%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
20
4
19