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Run: 2026-07-09-01KX41KNY1WB45W33EQGFF5C21
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
6.0s
Cost:
$0.003467
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 polished the manor windows while Detective Vale arrived alone. Inside, a grandfather clock chimed thirteen, then abruptly stopped forever. Mrs. Holloway lay beneath it, clutching an unfamiliar silver key. Nobody had entered, yet muddy footprints crossed the locked study. Vale noticed each print pointed inward, never toward the doorway. Three guests waited silently upstairs, each hiding something from him. Then the telephone rang, though its disconnected wires lay outside. Vale answered, hearing his own voice whisper, “Murder is listening.”
created_at
"2026-07-09T18:18:01.034Z"
7/9/2026, 6:18:01 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1994
moderation_latency
(null)
generation_time
5817
tokens_prompt
46
tokens_completion
513
native_tokens_prompt
41
native_tokens_completion
571
native_tokens_completion_images
0
native_tokens_reasoning
462
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
0.003467
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_0751bb9a966d2f83016a4fe5d91ae081949b0c91fa8fc82040"
is_byok
false
latency
233
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-1783621081-HCONzqyfbVRMFzgkKCty"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783621081-RelWVxFrpBu1gvR98xz7"
upstream_id
"resp_0751bb9a966d2f83016a4fe5d91ae081949b0c91fa8fc82040"
total_cost
0.003467
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
8
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10