Fable 5 is the biggest step up Iâve felt in our models since Opus 4.5 back in November. After 4.5 came out I uninstalled my IDE when I realized that Iâd been doing 100% of my coding in a terminal for a few weeks. With Fable, itâs felt like Claude has stepped up from being a coding agent to a thought and design partner in building the product. Fable has judgement, taste, and dimensionality in a way that previous models didnât, leading me to trust it more with the most complex work.
I think the first time I had this realization was when I asked Fable to debug something. It is the first model I have used that was so methodical and precise, taking measurements and adding logs then verifying that it truly fixed the issue before declaring victory.
Thereâs nothing in claude codeâs prompting telling the model to do that, itâs just part of its personality. It really has this âbig model smellâ that I havenât felt before.