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Run: 2026-07-09-01KX40C6BMSMSB5S5MGP2CRSYT
Run Details
Model:
GPT-5.6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.5s
Cost:
$0.000689
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
90.28%
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 whispered softly while Detective Vale entered the shuttered museum alone. Moonlight revealed crimson footprints crossing the marble floor toward darkness. A broken clock ticked thirteen, though midnight had passed hours earlier. Near the staircase, curator Bell lay beneath portraits of forgotten kings. His clenched hand held one silver button, polished and unfamiliar. Vale knelt carefully, hearing footsteps echo behind the locked entrance. Then every museum light flickered, revealing someone standing beside Bell. The stranger smiled, raised one finger, and vanished behind shadows.
created_at
"2026-07-09T17:56:27.132Z"
7/9/2026, 5:56:27 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
490
moderation_latency
(null)
generation_time
1361
tokens_prompt
46
tokens_completion
161
native_tokens_prompt
41
native_tokens_completion
108
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
0.000689
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_0d8df1f9fea8c145016a4fe0cb35e881969fc16e59784222cc"
is_byok
false
latency
287
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-1783619787-jkDcncKnqnIrIhV4zyRF"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619787-B6F6Il9MfwKTyfAWlbYC"
upstream_id
"resp_0d8df1f9fea8c145016a4fe0cb35e881969fc16e59784222cc"
total_cost
0.000689
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
90.28%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
11
1
10
2
11
3
11
4
10
5
10
6
10
7
10