It goes without saying that Bolt is amazing for quick prototyping and bringing your apps to the market fast. Now it has Claude Sonnet 4, which means it will create even better code. You don’t even have to do anything. The default model is now Sonnet 4. Diff mode has been upgraded to that as well.
Bolt now uses Sonnet 4 by default, no need to select anything!
→ The default model is Sonnet 4.
→ Diff Mode has been upgraded to Sonnet 4 too.
→ Discussion Mode is using Gemini 2.5 Flash.— bolt.new (@boltdotnew) June 9, 2025
For Discussion Mode, Bolt still uses Gemini 2.5 Flash.
[HT]
