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Run: 2026-07-09-01KX4098S8YZ3801SYD8PPJWQ2
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
7.4s
Cost:
$0.009923
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 hammered Blackthorn Hall as Detective Mara Vale arrived alone. The butler waited beneath the porch, pale, trembling, and silent. Inside, grandfather clocks had stopped simultaneously at precisely midnight together. A woman lay beside the library fireplace, clutching broken glass. Her blood darkened letters scattered across the expensive Persian carpet. Vale recognized one message: TRUST NOBODY IN THIS HOUSE TONIGHT. Behind her, the front door slammed though nobody entered there. Every guest gathered upstairs claimed hearing footsteps before screaming began. Somewhere nearby, a child laughed once, then suddenly stopped forever. Vale drew her revolver and noticed footprints leading inward upstairs. Each print was wet, although rain had never entered Blackthorn. At the staircase, someone whispered her name from below softly. Vale looked down, discovering herself reflected in a stranger’s eyes.
created_at
"2026-07-09T17:54:51.314Z"
7/9/2026, 5:54:51 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2032
moderation_latency
(null)
generation_time
7200
tokens_prompt
46
tokens_completion
567
native_tokens_prompt
41
native_tokens_completion
1647
native_tokens_completion_images
0
native_tokens_reasoning
1475
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
0.009923
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_0690ddc40dcd3cf5016a4fe06b6544819480d4cf87de8dae80"
is_byok
false
latency
262
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-1783619691-GljyTsdOkukXJnBKVFye"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619691-IfQjtcHYf93HPeMJWz8l"
upstream_id
"resp_0690ddc40dcd3cf5016a4fe06b6544819480d4cf87de8dae80"
total_cost
0.009923
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
13
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
12
10