Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family.
It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.
From sketch to home, built in 3D with Claude Opus 5.5 using Three.js + TSL. The architecture evolves through four stages: first lines, massing, detail, and finished home.
I asked Opus 5.5 to explain camera focus by building an interactive lens lab
Here's what it came up with after 1 hour 26 minutes in one shot, $25.66 API cost
lens.lab.sael.net
Move the focus ring and you can see the glass elements shift the sharp plane through the scene
Opus 5.5 made this galloping horse (entirely in code every pixel drawn procedurally).
One self-contained HTML file. Vanilla JS + Canvas 2D. No images or libraries.
128×96 pixels, articulated legs driven by inverse kinematics, 12-pose gallop...
Something is happening...
You can now discover tools, agents and expert partners on Claude Marketplace. Use it to:
- Add connectors and plugins like Slack and Notion
- Buy agents and products from companies like Cursor and CrowdStrike
- Scale with service partners like Accenture and Deloitte
Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family.
It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.
Together, these advances make Opus 5.5 a noticeably better collaborator. We’re excited to see what you build and discover.
Read more: anthropic.com/claude-opus-5-…
One more thing: we’re increasing five-hour usage limits on Pro, Max, and Team plans. We’re also providing subscription users a rate limit reset, which you can save and use whenever you choose.