Run: 2026-07-09-01KX4075RF33KR4MAZ8AM51BWF

Run Details

Model:: GPT-5.6 Luna
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 1.9s
Cost:: $0.000731
Provider:: OpenAI

Evaluation summary

Score	Evaluator	Details Link
93.52%	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

Rain whispered against windows while Detective Vale entered Blackthorn Manor.  
Every candle flickered, though no wind disturbed the velvet curtains.  
Beneath the grand staircase, Lord Ashcombe lay facedown, motionless.  
A crimson thread curled beside his outstretched hand like handwriting.  
Vale knelt silently, studying footprints crossing freshly polished marble floors.  
Behind him, someone locked the manor’s heavy front doors.  
The detective turned, finding twelve guests watching beneath pale masks.  
Then the grandfather clock struck midnight, and every candle died.

Evaluation details

Result

Evaluator

Details

Meta Data

93.52%

Matches word count

n/a

neededClean

false

sentences

wordCounts

0	10
1	10
2	9
3	10
4	10
5	9
6	10
7	10