claude code + cowork @anthropicai, prev: @dagster, @scale_ai
sf
Joined March 2018
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We heard your feedback that you want Claude to proactively take more off your plate! Claude Duet is a large step in this direction - it'll notice work that needs to be done, and then do it before you ask.
Join the waitlist here: claude.com/product/claude-du…
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we're letting in everyone from the waitlist daily as we have capacity. if you're pro/max, on the waitlist and didn't get access today, please dm me!
ICYMI projects can also now run a session locally (i.e. to test a desktop app, use claude in chrome, etc).
Sonnet 5.5 is here! In Claude Code, users get ~30% more tasks done compared to Sonnet 5. It's smarter, so it needs fewer tokens for the same work.
Here it rakes a yard of leaves using tool calls. 24s faster than Sonnet 5, with 6K fewer tokens. It leaves her extra time to read :)
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We've just added local support to Projects in Claude Code, so threads can now run on your own machine.
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We made claude.ai 3x faster in two weeks.
Here’s how we use Claude to measure, debug and improve performance. Prompts and methods included.
claude.dev/blog/how-we-made-…
If you’re looking for ways to try Opus 5.5 and Claude Tag in Slack…
I used Opus 5.5 to formally verify the Claude Agent SDK using Lean. A couple short prompts = 16 PRs fixing various bugs and race conditions. Video attached.
TLA+ also works well. I sometimes combine Lean and TLA+ to look for issues around data flow, concurrency, and state mgmt.
I don't know either language well, but Claude is excellent at both. This approach is super useful for formally modeling your code and finding bugs that a human probably wouldn't have spotted.
Is formal verification the future of coding (or at least, bug finding)?
Claude Opus 5.5 is now the default model in Claude Code and the Claude app, including Cowork, for Pro, Max, and Team plans. I’ve been using Opus 5.5 as a daily driver and love its clear communication skills and ability to write in my style.
We’re defaulting to effort medium across products, which is comparable to Fable 5.1 on intelligence but faster. Your rate limits will go 25% further on Opus 5.5 compared to Opus 5.
Give Opus 5.5 an ambitious task and let us know what you think!
In the new Projects experience, Claude coordinates all of your sessions.
I've been using it every day since it lets me operate at a higher level of abstraction. I fire off a batch of tasks and move on. Claude has context on everything I'm working on and can give me an aggregated status update whenever I ask. It also has long-lived memory that evolves as I use it.
We're rolling this out over the coming weeks. Let me know what you think!
Today, we are merging Claude Cowork and chat to simplify how you use Claude!
We are also integrating Claude Design so that you can ask Claude to make a Slide, Design, or Doc without needing to switch tabs or apps.
Many of you shared that you didn't want to choose which Claude product to use for any task. As Claude models have become more capable, we've found that Claude can handle the routing for you. Based on your prompt, Claude will decide whether to give a quick answer or do deeper agentic work, and what kind of output best fits the task.
You're in control the whole time: you can still stop, redirect, or exert finer control over Claude's effort or approach.
Give it a try and let us know what you think. We're rolling this out slowly over the next few weeks to get it right.
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Fable 5.1 makes Claude Tag even more useful. Here it builds a last-minute leadership deck from a metrics spreadsheet and other data across Slack, spots a vendor report that disagrees with the numbers, and flags it before moving on.
Claude Tag is available in Slack on Team and Enterprise plans.
With Fable 5.1, our team has taken on more ambitious projects that would have previously taken months. What big bets do you want to take?
Ask Fable 5.1 in Claude Code, Claude Cowork, Claude Tag to take on the task and let us know what you think!
Thanks to your feedback, we’ve unified memory across Chat and Cowork. Now, you can tell Claude to remember something once and it’ll have that context across surfaces!
Tell us what you’d like to see next :)
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We've been working on this with customers for a while. Mythos-class models require additional safety measures and enterprises need to meet their own privacy and compliance rules. Customers can own and control their own data and Anthropic retains none. It’s coming this fall.
Anthropic Plans to Change Data Retention Policy for Advanced AI bloomberg.com/news/articles/…
We'd love to talk with Cowork users in Corporate Finance and Accounting roles!
Have ideas on how we can improve? Sign up for a screen share with our team here: tinyurl.com/y5t2pepb
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Today we’re releasing an early preview of the /design command in Claude Code!
from CC Desktop or CLI, try something like "/design a few options for {feature}" before you build — pick your fave artboard, edit it and implement.
Join office hours with the Cowork team
If you're in marketing, sales, finance, legal, ops, or any non-eng role, book a 15 min slot to show us how you use Cowork so we can make it better for you: calendar.app.google/Nk75JSB5…
Thank you for sharing your feedback!
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It seems a common experience in the lives of people with high agency is that they, at some point, metaphorically, lean against a wall and discover that there is a hidden door. That some constraint they’ve been told about turns out not to hold, and this allows them to experience something positive. And from this they get into the habit of testing if walls are actually doors, and the more they do so, the more examples of hidden doors they find, and the more inclined they are to look for them. Far from the only thing that sets them apart, but having that experience can be transformative
— Henrik Olof Karlsson