BREAKING
Users Copy Fable 5 Onto Opus 4.8
How the Extraction Works
1
Prompt Fable 5
↓
2
Extract manual
↓
3
Load into Opus 4.8
↓
4
Fable 5 Lite
0
lines
System prompt
0
chars
Characters
0
tok
Tokens
SWE-Bench Pro: Fable 5 vs Opus 4.8
Fable 5
80.3
Opus 4.8
69
What Prompts Can and Can't Copy
Reproduced
~90%
●
More proactive output
●
Fewer low-quality results
●
Closer behavior
Missing
●
Reasoning from weights
●
Judgment on edge cases
●
Biology/cyber fallback
Free Fable 5 Ends July 12
AI NEWS BLITZ
A community push is extracting Fable 5's instructions to mimic it on Opus 4.8.