Claude Opus and Haiku just landed in Bolt

One agent. Three modes. Optimized for every task.

Hey builders,    One agent. Three modes. Optimized for every task.   You can now switch between three Claude models, each optimized for different tasks:   Reach for Opus 4.5 (higher token usage) for maximum reasoning, and deeper analysis. Built for next level designs, complex architecture, tough debugging, and performance optimization.   Stick with Sonnet 4.5 (your current default) for balanced performance, building features, debugging, and full-stack development.   Drop to Haiku 4.5 for simple tasks, faster responses, and lower token usage. Perfect for quick UI tweaks, fixing typos, and rapid iteration.   How it works: Select your model from the dropdown before starting a conversation. Switch anytime based on what you're working on.   Lower tiers use fewer tokens and respond faster, higher tiers use more tokens but provide deeper reasoning.   Try this: Use Haiku when iterating on styling/layouts Switch to Sonnet for most of your daily coding (this should be your default) Move to Opus for complex features or advanced layouts that need deep reasoning Same Claude Agent. More flexibility. See the announcement → Learn more→ Happy building! Eric Simons CEO & Co-Founder, Bolt.new StackBlitz, Inc., 2443 Fillmore Street #380-16814, San Francisco, CA, 94115, United States. To opt out of future emails from StackBlitz, click here to unsubscribe.