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Run: 2026-07-09-01KX40J23PD1NEYJBZWWFYE0AA
Run Details
Model:
GPT-5.6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.4s
Cost:
$0.000803
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
94.24%
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 tapped softly against windows overlooking Blackthorn Manor's empty courtyard. Detective Mara Voss arrived before dawn, carrying yesterday's newspaper. Inside, every clock had stopped precisely at midnight, together. A silver bell chimed upstairs, though nobody touched its handle. Mara found Lord Vale beneath portraits, smiling without his eyes. His blood darkened the carpet, forming an unfamiliar crooked arrow. Beside him lay one white glove, stitched with initials backward. The household gathered silently, each face concealing a private thunder. Then Mara noticed wet footprints leading toward the locked library.
created_at
"2026-07-09T17:59:39.389Z"
7/9/2026, 5:59:39 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
434
moderation_latency
(null)
generation_time
1277
tokens_prompt
46
tokens_completion
167
native_tokens_prompt
41
native_tokens_completion
127
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
0.000803
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_092e2c3bd8913591016a4fe18b728c81938b52472b467fc9c4"
is_byok
false
latency
272
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-1783619979-3RtKM43oKMadnEqpveHV"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619979-LQuoAAXYvVcsg7iSMDKk"
upstream_id
"resp_092e2c3bd8913591016a4fe18b728c81938b52472b467fc9c4"
total_cost
0.000803
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
94.24%
Matches word count
n/a
neededClean
false
sentences
9
wordCounts
0
10
1
9
2
9
3
10
4
10
5
10
6
10
7
10
8
10