Mike Krieger

Claude Cowork and Chat are now one Claude, starting today. The most common thing we hear: people aren't sure which product to start with. That friction gets in the way of getting the best from what these models can do. I've been on the unified version for a few weeks and really enjoy it. Claude does the deciding about how to get there, while I get to keep my thinking on the work itself. Let us know what you think! We'll be getting it dialed in over the coming weeks.

Also new today: Claude Docs, Claude Slides and Claude Design are now available in every conversation, powered by a revamped Artifacts platform. Ask for a design, deck, or document. Get back something you can edit, download, and take anywhere. Try it out for yourself and let us know what you think.

Sonnet 5.5, the second release in the 5.5 family, is out! It’s 30%+ faster than Sonnet 5 and up to 30% cheaper for most work.

Go try out Opus 5.5, which we launched today! It leads in coding and knowledge work, and it’s a great writer. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.

We launched Claude Fable 5.1 this morning! Fable models are built for complex, multi-step work that runs on its own, and Fable 5.1 sets a new standard across coding, knowledge work, and long-running problem-solving tasks.

Omid and the team did great work on this one. Most of my Claude Desktop work these days is in these new-style projects and I've really enjoyed how easy it is to kick off a bunch of work while still having a coordinator Claude responding quickly

Another model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!

I had trouble picturing the whole Iron Tangle level from Dungeon Crawler Carl, so I made an interactive artifact and I think I finally understand it: https://claude.ai/artifact/NTcG664cCbibbZNUFnCSu9?sk=HtqECKbpVqi8-DDzHAkh-Q

We're opening Claude Duet today as a research preview, starting with a waitlist. It's our take on giving everyone a trusted partner with your work. I've been using it for a few weeks, at work and at home. It drafted questions for a fireside chat, watched Slack over the weekend so I could log off, and told me about the new @nealstephenson book — and then ordered it from my local bookstore once I asked. We've found Opus 5.5 was our first model with the judgment to be proactive in the right ways. Here's what that's looked like.