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Run: 2026-07-09-01KX403X814PZGKAEBSJKNFHTM
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
9.7s
Cost:
$0.005609
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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain stitched silver lines across the manor's dark windows tonight. Inside, Inspector Vale discovered the body beneath grandfather's stopped clock. A single red glove rested beside the victim's outstretched hand. No footprints disturbed the dust surrounding the locked library door. Vale noticed every portrait faced inward, watching the silent corpse. Behind him, someone whispered, "You should have stayed away forever." The grandfather clock suddenly chimed thirteen, then fell strangely silent. Vale examined the corpse, finding no wound, only unnatural frost. A hidden music box began playing the victim's childhood lullaby. Then the library door unlocked itself with a soft click. Vale raised his revolver, facing three identical shadows behind him. Only one shadow moved, and it wore the red glove.
created_at
"2026-07-09T17:51:55.656Z"
7/9/2026, 5:51:55 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2277
moderation_latency
(null)
generation_time
9519
tokens_prompt
46
tokens_completion
594
native_tokens_prompt
41
native_tokens_completion
928
native_tokens_completion_images
0
native_tokens_reasoning
771
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
0.005609
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_0eacf9b106957026016a4fdfbbbd8081959c18f38f5a779aa3"
is_byok
false
latency
261
model_permaslug
"openai/gpt-5.6-luna-20260709"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1783619515-UjgIDguo4CO5g6qR4R3P"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619515-hSs2fvtnFiMPYhU8xbMR"
upstream_id
"resp_0eacf9b106957026016a4fdfbbbd8081959c18f38f5a779aa3"
total_cost
0.005609
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
12
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10