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Run: 2026-07-09-01KX409MAHE8KXY9X9CP42YJ09
Run Details
Model:
GPT-5.6 Luna (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
8.8s
Cost:
$0.005957
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 Blackwood Manor as Inspector Vale arrived before dawn. The front door stood open, though every window remained locked. Inside, the grandfather clock had stopped precisely at midnight, again. On the library carpet, Lord Ashcombe lay beside shattered crystal. No blood marked his shirt, yet his eyes accused everyone. Vale noticed five chairs arranged around the body, all untouched. His pocket watch was missing, but its chain remained attached. Behind him, footsteps creaked softly across the upstairs corridor floorboards. Vale turned, finding only a silver mask watching from darkness. A whisper slipped beneath the door: “You arrived too late.”
created_at
"2026-07-09T17:55:03.131Z"
7/9/2026, 5:55:03 PM
model
"openai/gpt-5.6-luna-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2094
moderation_latency
(null)
generation_time
8521
tokens_prompt
46
tokens_completion
705
native_tokens_prompt
41
native_tokens_completion
986
native_tokens_completion_images
0
native_tokens_reasoning
855
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
0.005957
router
(null)
provider_responses
0
endpoint_id
"eebea444-34a5-4642-a766-cb319471d33a"
id
"resp_0f0d1c43097b99bc016a4fe077322c81909a8debb7e2945b99"
is_byok
false
latency
420
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-1783619703-F0zyH5N64eAmBEYERx1M"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783619703-5EHXsMdEt1TrFcrzYFiq"
upstream_id
"resp_0f0d1c43097b99bc016a4fe077322c81909a8debb7e2945b99"
total_cost
0.005957
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
10
wordCounts
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10