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Run: 2026-07-09-01KX40YBYXKZBW3CPVQSK56J9Y
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.4s
Cost:
$0.007757
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 silvered Blackthorn Manor as Detective Vale arrived before dawn. Inside, the grandfather clock had stopped precisely at midnight somehow. A thin smear of blood marked the polished entrance floor. Vale noticed muddy footprints leading toward the locked library door. Behind it, someone whispered his name, then abruptly fell silent. He tested the handle, discovering fresh scratches around the keyhole. From upstairs came one sharp cry, followed by absolute silence. The housekeeper appeared pale, clutching a silver serving tray tightly. She claimed nobody entered, yet mud darkened her slippers overnight. Vale asked where the victim was, and everyone looked upstairs. Then the library door creaked open without anyone touching it. A bloodstained glove slid across the threshold toward Vale silently.
created_at
"2026-07-09T18:06:22.695Z"
7/9/2026, 6:06:22 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2091
moderation_latency
(null)
generation_time
7211
tokens_prompt
46
tokens_completion
622
native_tokens_prompt
41
native_tokens_completion
1286
native_tokens_completion_images
0
native_tokens_reasoning
1120
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
0.007757
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_027e87648ed5b1f6016a4fe31ec3688190a7a5821465cac8eb"
is_byok
false
latency
207
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-1783620382-oLnd569C5dVw35ict2Vx"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620382-aq6Jj9gcFF1hBYpJgkn2"
upstream_id
"resp_027e87648ed5b1f6016a4fe31ec3688190a7a5821465cac8eb"
total_cost
0.007757
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