BREAKING
Claude's Writing Style Shifts
Answers Grow Sharply
Opus 4.5
158
Fable 5
316
Opus 5
510
0
%
sentence length rise
0
%
clause frequency rise
0
pp
long-word share drop
Opus and Fable Diverge
Opus 5
More elaborate
●
Longest answers
●
Fewer hedges
Fable 5
More concise
●
More validation
●
More agreement openers
Reception Splits by Workflow
Method Details Still Matter
AI NEWS BLITZ
Arena found a marked shift in how high-reasoning Claude models write.