Bolt.new December 1, 2025 Changelog
What changed in Bolt December 1, 2025, released 2025-12-01 — explained in plain English.
- You now have three different AI "brains" to choose from when building apps.
- The default brain stays the same, but you get new fast and super-smart options.
- This update is all about giving you more control over how the AI helps you code.
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This release is all about giving you choices. If you use Bolt.new to build apps, the AI assistant that writes your code just got some new options. This matters because it lets you pick the right AI "brain" for your specific project, whether you need something super fast, highly creative, or a good balance of both.
What's new
- New AI models to choose from: When you use the Claude Agent (the AI helper inside Bolt.new), you can now pick from three different "brains" made by a company called Anthropic. You can choose Haiku 4.5 (which is super fast), Sonnet 4.5 (the default, everyday option), or Opus 4.5 (the heaviest, smartest model for really tough problems).
Improvements
- More control over your projects: While the AI models themselves are new, having the ability to switch between them is a big upgrade. It means you are no longer stuck with just one way of working. You can switch to a faster model for quick fixes or a smarter one for complex coding.
Fixes
No bug fixes were mentioned in this update.
Breaking changes
No breaking changes in this release.
This is our plain-language summary. Read the complete, official notes on the Bolt.new official changelog ↗.
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