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Run: 2026-07-09-01KX41ANHY8K75HB1802DYZ8JP
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
5.3s
Cost:
$0.005045
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 courthouse windows while Inspector Vale arrived alone. Inside, the dead judge waited beneath his fallen portrait, motionless. His right hand clutched a silver key, still dripping rainwater. Three witnesses watched Vale enter, each hiding something different tonight. Nobody mentioned the locked study or missing blue ledger upstairs. Vale noticed muddy footprints crossing the carpet toward the fireplace. At midnight, someone had burned a message into ashes nearby. Only one word survived: Remember what she promised yesterday, Inspector. Then the courthouse bell rang, though its ropes were severed. Vale looked upward as footsteps whispered above the ceiling again. Everyone froze, but the judge's corpse slowly opened one eye.
created_at
"2026-07-09T18:13:05.733Z"
7/9/2026, 6:13:05 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
1798
moderation_latency
(null)
generation_time
5060
tokens_prompt
46
tokens_completion
494
native_tokens_prompt
41
native_tokens_completion
834
native_tokens_completion_images
0
native_tokens_reasoning
682
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
0.005045
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_07a1e42f6a2371dd016a4fe4b1c900819684868829fb194f58"
is_byok
false
latency
194
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-1783620785-vbdjItLoIpKsG9H5S9gM"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620785-PAduap0mf9UwMV67YXIk"
upstream_id
"resp_07a1e42f6a2371dd016a4fe4b1c900819684868829fb194f58"
total_cost
0.005045
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
11
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10