Run: 2026-07-09-01KX40K6YGBXW4QHJGH14DJKV4

Run Details

Model:: GPT-5.6 Luna (Reasoning)
Test:: N-Length Sentences
Scenario:: Write sentences with 10 words each
Duration:: 6.2s
Cost:: $0.006461
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

Rain hammered Blackthorn Manor as Inspector Vale arrived alone tonight.  
Behind him, the iron gates swung shut without warning forever.  
Inside, a chandelier flickered above the silent, bloodstained ballroom floor.  
Lord Ashcombe lay beneath it, clutching another person's silver locket.  
His eyes remained open, fixed accusingly upon the balcony above.  
Vale noticed muddy footprints crossing freshly polished marble toward shadows.  
A clock chimed midnight, though every candle showed eleven precisely.  
From upstairs, someone began playing Ashcombe's favorite waltz slowly again.  
Vale reached for his revolver and heard laughter behind him.  
The ballroom doors were locked, yet three guests watched silently.  
None admitted entering, yet all possessed identical silver lockets somehow.  
Then the corpse whispered Vale's name from beneath the ballroom.

Evaluation details

Result

Evaluator

Details

Meta Data

100.00%

Matches word count

n/a

neededClean

false

sentences

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