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Run: 2026-07-09-01KX402QSP9SWP0WG44QKW94QB
Run Details
Model:
GPT-5.6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
2.1s
Cost:
$0.000911
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
94.82%
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 the sleeping coastal town. Detective Mara Venn arrived before dawn, carrying yesterday's unanswered questions. Inside, the mayor lay beneath portraits, still clutching crimson roses. No doors stood broken, yet muddy footprints crossed the marble floor. A grandfather clock chimed six, then abruptly stopped between heartbeats. Mara noticed seawater pooled beneath the mayor's polished writing desk. Beside it, someone had carved three letters into floorboards. Those letters matched names missing from the town's oldest ledger. Outside, gulls screamed while distant bells announced another approaching tide. Mara opened the ledger, discovering her own name listed there.
created_at
"2026-07-09T17:51:17.312Z"
7/9/2026, 5:51:17 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
387
moderation_latency
(null)
generation_time
1450
tokens_prompt
46
tokens_completion
191
native_tokens_prompt
41
native_tokens_completion
145
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
0.000911
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_057cd0a783eb6d11016a4fdf95647c8195ae951abe82f8237f"
is_byok
false
latency
241
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-1783619477-N5ALzSphqKGvn7d6YU5s"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619477-6IFmGCWTFaip7RwJYK5K"
upstream_id
"resp_057cd0a783eb6d11016a4fdf95647c8195ae951abe82f8237f"
total_cost
0.000911
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
94.82%
Matches word count
n/a
neededClean
false
sentences
10
wordCounts
0
10
1
10
2
10
3
11
4
10
5
10
6
9
7
10
8
10
9
10