Armin Ronacher / Armin Ronacher's Thoughts and Writings:

Claude Opus 4.8 and Sonnet 5 seem worse at tool calls than older models, likely due to post-training that assumes Claude Code-like harnesses as targets  —  A very strange Pi issue sent me down a rabbit hole over the last two days.  The short version is that newer Claude models sometimes call Pi's edit tool …

Armin Ronacher / Armin Ronacher's Thoughts and Writings:

Claude Opus 4.8 and Sonnet 5 seem worse at tool calls than older models, likely due to post-training that assumes Claude Code-like harnesses as targets  —  A very strange Pi issue sent me down a rabbit hole over the last two days.  The short version is that newer Claude models sometimes call Pi's edit tool …

Source: TechMeme
Source Link: https://www.techmeme.com/260706/p4#a260706p4