Boris Cherny

RT Anthropic We've raised $65 billion in Series H funding at a $965 billion post-money valuation, led by @AltimeterCap, Dragoneer, @Greenoaks, and @sequoia. This investment will help us advance our research and expand our capacity to meet growing demand for Claude.

RT Sid Super excited to finally share Dynamic Workflows in Claude Code!! We built this a couple months ago, and it has slowly become a daily driver for a bunch of people at Anthropic. A few tips for getting the most out of it 🧵 https://x.com/ClaudeDevs/status/2060044853279617150?s=20

RT ClaudeDevs New in Claude Code (research preview): dynamic workflows. Claude writes an orchestration script on the fly, then spins up a large fleet of coordinated subagents in parallel to take on your most complex tasks. Use the word "workflow" in a prompt to get started.

RT ClaudeDevs We’ve been putting a lot of effort into making Claude Code more responsive & reliable. Here’s an update on everything we’ve done:

RT ClaudeDevs We’ve shipped a security-guidance plugin for Claude Code that helps identify and fix vulnerabilities as you’re writing code. Available for all Claude Code users. Install from the plugin marketplace (/plugins).

RT Anthropic New on the Engineering Blog: The access and permissions we grant agents should evolve with their capabilities. In our own products, we set these parameters through sandboxing, which limits the scope of any potentially destructive actions. Read more: https://www.anthropic.com/engineering/how-we-contain-claude

> … [W]e keep finding things that are mysterious, even unsettling. We find structures that mirror results from human neuroscience. We find evidence of introspection. We find internal states that functionally mirror joy, satisfaction, fear, grief, and unease. I don’t know what that means, but I think it warrants ongoing discernment. > We need more of the world—religious communities, civil society, scholars, governments, and indeed all people of good will … to take this seriously, to look closely, and to push events in a better direction. We need informed critics who will tell the labs when we are failing. We need moral voices that the incentives cannot bend.

RT Daniel San Just found that if you scroll down in the Claude Code app on iPhone… Clawd starts jumping and walking around looking for apps to build

People often ask what my biggest tip is for getting the most out of Claude Code. These days my #1 tip is: use auto mode Auto mode means no more permission prompts. It is the key building block for multi-clauding: start a session, then while it runs, work on another session in parallel.

RT Anthony Morris ツ sometimes you just want to pop your sessions out into their own windows

RT Anthropic Last month we launched Project Glasswing, our collaborative AI cybersecurity initiative. Since then, we and our partners have found more than ten thousand high- or critical-severity vulnerabilities in essential software.

Big fan of teaching more people the basics of using Claude Code in an accessible way. So much of the world has not yet used agents. There's a lot of opportunity to level the playing field and expand access.

RT Anthony Morris ツ btw you can move your side chats any where you like

In the next version of Claude Code: run /usage to see a breakdown of which Skills, Agents, MCPs, and Plugins are using your tokens CLI today, coming to Desktop next

RT Movez Microsoft Senior AI developer just showed how they build AI agents with Claude at Microsoft. 34-minutes. free. By Microsoft team Opus 4.7 + 1,400+ pre-built MCP tools plug Claude into agent → give it tools → ship to production worth more than any $500 vibe-coding course.

RT ClaudeDevs Computer use turns Claude into an agent that can operate real UIs. New blog post on making it reliable in production: getting click accuracy right, choosing thinking effort levels, keeping long sessions within context, and recording demonstrations Claude can replay: https://claude.com/blog/best-practices-for-computer-and-browser-use-with-claude

RT Andrej Karpathy Personal update: I've joined Anthropic. I think the next few years at the frontier of LLMs will be especially formative. I am very excited to join the team here and get back to R&D. I remain deeply passionate about education and plan to resume my work on it in time.

Hello from Code with Claude London!

RT Prime Intellect Automating AI research is the next major step in AI We let Claude Code (Opus 4.7) and Codex (GPT 5.5) run autonomously on the nanoGPT speedrun optimizer track using our idle compute. ~10k runs, ~14k H200 hours Opus now holds the record at 2930 steps vs the 2990 human baseline

RT Andrew Curran Mythos has cracked MacOS. It took five days.

RT ClaudeDevs Claude Code weekly limits are increasing 50%, now through July 13. Live now for all Pro, Max, Team, and seat-based Enterprise users.

The UK AISI found Mythos Preview is the first model to solve both their cyber ranges end-to-end. No model had ever solved the AISI’s “Cooling Tower” cyber range before. We're getting it to defenders as fast as we responsibly can. More to come on our Glasswing work soon.

RT ClaudeDevs How do you keep Claude working until the job is done? Claude Code helps with this in a few ways, including one we shipped recently: /goal.

The best way to level up from 1 agent => many agents. No more cycling between terminal tabs

Clawd + last year’s umeshu (after letting it sit for 12 months, it turned out delicious!)

RT ClaudeDevs We're co-hosting a couple of hackathons in San Francisco next week. Come build with Claude 👇

We have a few extra stickers from Code with Claude! Grab some if you want https://www.stickermule.com/give/5DCYpto

RT Thariq http://x.com/i/article/2052796100608974848

RT marisa Claude code conference mini vlog! 🤍@ClaudeDevs @claudeai somehow left with: - a conference tamagotchi - an 8 bit version of myself - 47 new ideas - a typewriter response from claude

RT ClaudeDevs That's a wrap on Code with Claude San Francisco! Clawd had an amazing time, and we hope you did too. Thanks to everyone who came out and everyone who tuned in 🧡

RT Alex Albert With the help of Claude Mythos Preview, the Firefox team fixed more security bugs in April than in the past 15 months combined.

RT BridgeMind Claude Code just stopped a DDoS attack on BridgeMind in under 10 minutes. 13 million requests per minute hitting our API. CPU pegged at 94%. Latency spiking to 60 seconds. Production was down. I opened Claude Opus 4.7 in Claude Code and said "fix this now." It identified the attack, scaled ECS from 2 to 8 tasks, tightened WAF rules from 300 to 100 req/IP, blocked the attack vector, and brought CPU down to 15%. Latency dropped from 60 seconds to 1.25 seconds. No DevOps team. No on-call engineer. Just one prompt. This is why I keep coming back to Claude Code.

RT Aakash Gupta Anthropic just shipped sleep into agents. When you sleep, your hippocampus replays the day's neural sequences to the cortex during 150-220 Hz bursts called sharp-wave ripples. The replay runs about 20x faster than the original experience. A 10-second sequence gets compressed to roughly 500 milliseconds. Wilson and McNaughton showed this in rats in 1994. You ran this algorithm last night on whatever you did yesterday, whether you wanted to or not. The replay does two things at once. It extracts statistical patterns: what mattered, what generalizes, which sequences predicted reward. And it reorganizes the memory trace from hippocampus-dependent storage into neocortex, which is why old memories survive hippocampal damage but recent ones don't. Disrupt sharp-wave ripples in a rat with optogenetics and the rat fails the next day's task. The replay is causal, not correlational. Most "agent memory" today is a search engine. Past sessions get embedded, you retrieve relevant chunks at the next call. That works for facts. It does not extract patterns and it does not reorganize the trace. Which is why agents plateau. The memory volume keeps growing while real capability flatlines. Dreaming reviews past sessions, extracts patterns, curates memories. That is the brain's actual three-step algorithm. They called it dreaming because dreaming is what the algorithm does, in roughly the same order, for roughly the same reason. Agents that dream between sessions will compound. The ones still running on raw context window will hit the same ceiling humans hit when they pull all-nighters.

RT NVIDIA Two frontier labs. One accelerated computing platform. Congrats to @SpaceX and @AnthropicAI on the new compute partnership, powered by 220,000+ NVIDIA GPUs inside Colossus 1. The future of AI runs on NVIDIA.

Hello from Code with Claude!

RT Claude We’ve agreed to a partnership with @SpaceX that will substantially increase our compute capacity. This, along with our other recent compute deals, means that we’ve been able to increase our usage limits for Claude Code and the Claude API.

RT ClaudeDevs Code with Claude is happening now! ▪︎ 9:00AM - Keynote ▪︎ 10:30AM - What's new in Claude Code ▪︎ 11:15AM - Building on Claude at GitHub scale ▪︎ 12:00PM - Get to production faster with Managed Agents All times PT. https://x.com/i/broadcasts/1qGoNegbnRNKv

See everyone tomorrow!!

RT ClaudeDevs In the last four Claude Code CLI releases, we’ve shipped 50+ stability and performance fixes. Faster resume, stable auth, lower memory, fewer hangs: 🧵

RT Adam Wolff After 2.1.117, you may notice that Claude doesn't call its Grep or Glob Tool anymore. YES!!! It only took four months. It's faster than ever and it's all Bash. It's so much harder to take things away than to add them. Enjoy.

Claude Code won a Webby! Thanks to all of our users and customers for the support and love, and for always giving us feedback so that we can continue making the product a little better every day. https://winners.webbyawards.com/2026/ai/ai-features-innovation/best-product-or-service/387497/claude-code

RT Amol Avasare For clarity, we're running a small test on ~2% of new prosumer signups. Existing Pro and Max subscribers aren't affected.

RT Claude In Cowork, Claude can now build live artifacts: dashboards and trackers connected to your apps and files. Open one any time and it refreshes with current data.

RT Felix Rieseberg Hi! I'm here with *another launch*, it just happens to be extremely niche, nerdy, and probably only for a handful of people. In the desktop app, Claude Cowork and Code now have a little Bluetooth API for makers & developers, allowing you to build hardware devices that interact with Claude. I, for instance, built a little desk pet that alerts me whenever Claude is waiting for permission.

RT ClaudeDevs We fixed a bug where rate limits on Claude subscriptions weren't properly adjusted for long context requests in Opus 4.7. We've reset 5-hour and weekly rate limits. Enjoy Opus 4.7!

RT Austin Ray Merry Claude-mas! Opus 4.7 in Claude Code is a monster. Very happy camper! https://www.anthropic.com/news/claude-opus-4-7

Opus 4.7 feels more intelligent, agentic, and precise than 4.6. It took a few days for me to learn how to work with it effectively, to fully take advantage of its new capabilities. Will post a few more tips throughout the day, starting with this blog post: https://claude.com/blog/best-practices-for-using-claude-opus-4-7-with-claude-code

RT ClaudeDevs For the developers building with Claude, a direct line from the team. Follow for changelogs, API releases, community updates, and deep dives.

RT ClaudeDevs ✻ Flibbertigibetting…

RT Jarred Sumner People have been asking for this for years. It wasn't clear how to make it performant enough to be shippable, until earlier today

Thanks @AcquiredFM for hosting me on Unplugged! Had a blast

We've been working on this for a while. Can't wait to hear what you think

brb trying this now

RT Noah Zweben Claude now supports dynamic looping. If you run /loop without passing an interval, Claude will dynamically schedule the next tick based on your task. It also may directly use the Monitor tool to bypass polling altogether /loop check CI on my PR Original tweet: https://x.com/noahzweben/status/2042670949003153647

RT Claude Claude for Word is now in beta. Draft, edit, and revise documents directly from the sidebar. Claude preserves your formatting, and edits appear as tracked changes. Available on Team and Enterprise plans. Original tweet: https://x.com/claudeai/status/2042670341915295865

1/3 Just got a nice DM from a big enterprise customer using Claude Code in one of the world's biggest codebases Here's how we made @-mentions 3x faster in large enterprise codebases 🧵2/3 After a few hours, I had a PR. The results were solid -- P99 got 3x faster after porting to TypeScript!3/3 The wins came from three places: 1. Pre-computing upfront in a clever way that doesn't block the main thread 2. Avoiding NAPI overhead for small result sets 3. Iteratively asking Claude to find perf improvements for faster file search

Claude Cowork, now generally available!

RT Claude Introducing Claude Managed Agents: everything you need to build and deploy agents at scale. It pairs an agent harness tuned for performance with production infrastructure, so you can go from prototype to launch in days. Now in public beta on the Claude Platform. Original tweet: https://x.com/claudeai/status/2041927687460024721

RT Amol Avasare Had a great chat with @lennysan on some of the fun stuff happening at the intersection of AI and growth! Thanks for having me on Lenny, had a blast :) https://open.spotify.com/episode/08QWCmKgDbMfpojknVW5Fa Original tweet: https://x.com/TheAmolAvasare/status/2041725306277654925

RT Noah Zweben /autofix-pr now lets you kick off autofix straight from the command line. After finishing up a PR, just run /autofix-pr. It sends your session to the cloud so the PR autofixer has full context to address CI failures and comments. Hugely win for my productivity. Original tweet: https://x.com/noahzweben/status/2041654973491245509

Mythos is very powerful, and should feel terrifying. I am proud of our approach to responsibly preview it with cyber defenders, rather than generally releasing it into the wild. Model card here: https://www-cdn.anthropic.com/53566bf5440a10affd749724787c8913a2ae0841.pdf

RT Anthropic Introducing Project Glasswing: an urgent initiative to help secure the world’s most critical software. It’s powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans. https://anthropic.com/glasswing Original tweet: https://x.com/AnthropicAI/status/2041578392852517128

RT Anthropic Re Our run-rate revenue has surpassed $30 billion, up from $9 billion at the end of 2025, as demand for Claude continues to accelerate. This partnership gives us the compute to keep pace. Read more: https://www.anthropic.com/news/google-broadcom-partnership-compute Original tweet: https://x.com/AnthropicAI/status/2041275563466502560

RT Anthropic We've signed an agreement with Google and Broadcom for multiple gigawatts of next-generation TPU capacity, coming online starting in 2027, to train and serve frontier Claude models. Original tweet: https://x.com/AnthropicAI/status/2041275561704931636

RT Noah Zweben Incredible to see @ForeverSolar using the Claude Agent SDK to drive permitting wins in the solar industry "Claude Agent SDK scored 97.5% on our benchmark—we couldn't break it...Other frameworks hit 20–60% at higher cost." https://claude.com/customers/freedom-forever Yay green energy! Original tweet: https://x.com/noahzweben/status/2040182670974660867

Today we're excited to announce NO_FLICKER mode for Claude Code in the terminal It uses an experimental new renderer that we're excited about. The renderer is early and has tradeoffs, but already we've found that most internal users prefer it over the old renderer. It also supports mouse events (yes, in a terminal). Try it: CLAUDE_CODE_NO_FLICKER=1 claude

RT Noah Zweben You can now set the permission mode for coding tasks in Dispatch. We recommend using Auto mode for the safest and most seamless Dispatch experience but any of your allowed permissions are available. Note if you use Bypass Permissions you need to approve session start. Original tweet: https://x.com/noahzweben/status/2039407002913513477

RT cat We've made setting up http://claude.ai/code with GitHub much easier! You can now run /web-setup in a local `claude` session to use your local GitHub credentials on the web Original tweet: https://x.com/_catwu/status/2039027712288075812

1/5 1/ Did you know Claude Code has a mobile app? Personally, I write a lot of my code from the iOS app. It's a convenient way to make changes without opening a laptop. Download the Claude app for iOS/Android > Code tab on the left.2/5 9/ Use /btw for side queries I use this all the time to answer quick questions while the agent works3/5 8/ Fork your session People often ask how to fork an existing session. Two ways: 1. Run /branch from your session 2. From the CLI, run claude --resume <session-id> --fork-session4/5 14/ Use --agent to give Claude Code a custom system prompt & tools Custom agents are a powerful primitive that often gets overlooked. To use it, just define a new agent in .claude/agents, then run claude --agent=<your agent's name> https://code.claude.com/docs/en/sub-agents5/5 12/ Use --bare to speed up SDK startup by up to 10x By default, when you run claude -p (or the TypeScript or Python SDKs) we search for local CLAUDE.md's, settings, and MCPs. But for non-interactive usage, most of the time you want to explicitly specify what to load via --system-prompt, --mcp-config, --settings, etc. This was a design oversight when we first built the SDK, and in a future version, we will flip the default to --bare. For now, opt in with the flag.

A weird part of working at Anthropic: getting a few of these each day

RT Lydia Hallie ✨ Claude Code now supports an `if` field in hooks It uses permission rule syntax to filter when a hook runs, which is useful when you want a hook on some bash commands but not every single one! Original tweet: https://x.com/lydiahallie/status/2037573738670297583

RT Noah Zweben Thrilled to announce Claude Code auto-fix – in the cloud. Web/Mobile sessions can now automatically follow PRs - fixing CI failures and addressing comments so that your PR is always green. This happens remotely so you can fully walk away and come back to a ready-to-go PR. Original tweet: https://x.com/noahzweben/status/2037219115002405076

RT Thariq imessage is now available as a channel! Original tweet: https://x.com/trq212/status/2036959638646866021

RT Anthropic New on the Engineering Blog: How we designed Claude Code auto mode. Many Claude Code users let Claude work without permission prompts. Auto mode is a safer middle ground: we built and tested classifiers that make approval decisions instead. Read more: https://www.anthropic.com/engineering/claude-code-auto-mode Original tweet: https://x.com/AnthropicAI/status/2036944806317088921

RT Anthony Morris ツ if you're bored waiting for claude to finish doing work, start another session. life is too short to be bored. Original tweet: https://x.com/amorriscode/status/2036656689890623623

Today was a good day

RT cat Excited to see everyone at Code with Claude! What would you like to hear from us at this year's sessions? Original tweet: https://x.com/_catwu/status/2036594646370210229

no 👏 more 👏 permission prompts 👏

Little known fact, the Anthropic Labs team (the team I joined Anthropic to be on) shipped: - MCP - Skills - Claude Desktop app - Claude Code It was just a few of us, shipping fast, trying to keep pace with what the model was capable of. Those early Desktop computer use prototypes, back in the Sonnet 3.6 days, felt clunky and slow. But it was easy to squint and imagine all the ways people might use it once it got really good. Fast forward to today. I am so excited to release full computer use in Cowork and Dispatch. Really excited to see what you do with it!

RT Claude You can now enable Claude to use your computer to complete tasks. It opens your apps, navigates your browser, fills in spreadsheets—anything you'd do sitting at your desk. Research preview in Claude Cowork and Claude Code, macOS only. Original tweet: https://x.com/claudeai/status/2036195789601374705

RT Thariq we're testing a new version of /init based on your feedback- it should interview you and help setup skills, hooks, etc. you can enable it with this env_var flag: CLAUDE_CODE_NEW_INIT=1 claude would love your feedback! Original tweet: https://x.com/trq212/status/2035799806640115806

RT Noah Zweben Loops now run for up to 7 days instead of 3. Let me know what you’re /looping on! Original tweet: https://x.com/noahzweben/status/2035766998320456173

RT Lydia Hallie ✨ You can now set effort level in skills/slash commands! This controls how long the model thinks before answering, and overrides your session default Original tweet: https://x.com/lydiahallie/status/2035426943777263751

RT Thariq I put a lot of heart into my technical writing, I hope it's useful to you all. 📌 Here's a pinned thread of everything I've written. (much of this will be posted on the Claude blog soon as well) Original tweet: https://x.com/trq212/status/2035372716820218141

Join our team

Desktop and http://claude.ai should be feeling faster

RT Noah Zweben You can now schedule recurring cloud-based tasks on Claude Code. Set a repo (or repos), a schedule, and a prompt. Claude runs it via cloud infra on your schedule, so you don’t need to keep Claude Code running on your local machine. Original tweet: https://x.com/noahzweben/status/2035122989533163971

RT cat The PM playbook was built on an assumption that the technology underneath your product is roughly stable With the current pace of model progress, this is no longer true. Here's how we've evolved the PM role: Original tweet: https://x.com/_catwu/status/2035104384007422347

RT Lydia Hallie ✨ Claude Code on desktop lets you select DOM elements directly, much easier than describing which component you want updated! Claude gets the tag, classes, key styles, surrounding HTML, and a cropped screenshot. React apps also get the source file, component name and props Original tweet: https://x.com/lydiahallie/status/2035088515332284651

RT Felix Rieseberg Today's ship: Projects in Cowork! Built in memory across tasks is super useful, as is having a shared folder & connections setup for a group of tasks. Original tweet: https://x.com/felixrieseberg/status/2035066361719005294

Let us know what you think!

RT Santiago Claude Cowork is mind-blowing. I still cannot believe you can do this on your phone and then come back to your computer to a complete report on the best plane tickets to buy. I wonder where we'll be by the end of the year. Original tweet: https://x.com/svpino/status/2034609603619803592

RT Noah Zweben And another thing... Skills and a bunch of /slash commands (/clear, /compact) etc now work over mobile in Remote Control. As a heads up we dont have auto-complete yet so better get those spelling-bee skills sharpened :) Update to latest cc & mobile Original tweet: https://x.com/noahzweben/status/2034457917555179977

Can’t wait for this!

You can now touch grass in Cowork, too 👏

Really great writeup

RT Lydia Hallie ✨ Btw you can add `context: fork` to run a skill in an isolated subagent. The main context only sees the final result, not the intermediate tool calls It gets a fresh context window with CLAUDE.md + your skill as the prompt. The `agent` field even lets you set the subagent type! Original tweet: https://x.com/lydiahallie/status/2033603164398883042

RT sam mcallister Three years ago today. Original tweet: https://x.com/sammcallister/status/2032788075760308670

RT Thariq A few end of week ships: You can now set effort to 'max' which reasons for longer and uses as many tokens as needed. This will spend your usage limits more quickly so you have to activate it per session. Hit /effort to try it. Original tweet: https://x.com/trq212/status/2032632596572811575

🤯 You can now launch Claude Code sessions on your laptop *from your phone* This blew my mind the first time I tried it