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Run: 2026-07-09-01KX40G5NR3XVSD692CVDMZXPP
Run Details
Model:
GPT-5.6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
1.5s
Cost:
$0.000977
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
13.01%
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
Rain polished the cobblestones outside Blackthorn Manor, while Inspector Vale studied footprints dissolving beneath the midnight storm. Inside, a grandfather clock had stopped at twelve, though every witness swore it chimed thirteen times. Lady Ashcombe lay beside the library hearth, clutching a torn playing card and wearing someone else’s emerald ring. Inspector Vale noticed fresh mud beneath the locked window, then quietly asked which guest had arrived without an umbrella. No one answered immediately; instead, the butler dropped a silver tray, revealing blood beneath its polished underside. From the staircase, young Clara whispered that the murderer still hid upstairs, listening patiently to every frightened breath. Vale looked toward the dark landing, where a single candle flickered, though nobody stood anywhere near it.
created_at
"2026-07-09T17:58:37.503Z"
7/9/2026, 5:58:37 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
347
moderation_latency
(null)
generation_time
1328
tokens_prompt
46
tokens_completion
220
native_tokens_prompt
41
native_tokens_completion
156
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
0.000977
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_04f09eedbceb0596016a4fe14d925c819086b89787a4a3ad80"
is_byok
false
latency
204
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-1783619917-PtAhv0DuxCFawtMNK4jq"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619917-KvKmc8GfLzxowsZ1ruQD"
upstream_id
"resp_04f09eedbceb0596016a4fe14d925c819086b89787a4a3ad80"
total_cost
0.000977
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
13.01%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
17
1
16
2
18
3
19
4
17
5
18
6
17