RT @ehsanik: 55.7% -> 70.6% on OSWorld v2 (released just a few weeks ago) Genuinely would love to have a harder computer use evals. Happy to sponsor a computer use benchmark that Opus 5 gets below 50% on! If you have an eval that matches this criteria please reach out! Happy to chat.

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · 2w ago

RT @claudeai: On several coding and knowledge work evaluations, Opus 5 is the new state-of-the-art:

RT @alexalbert__: Just over 6 months later, Opus 5 now produces near-superhuman level spreadsheets and slide decks that match what a consultant would make. Things are changing fast.

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · 7mo ago

RT @alexalbert__: I'm hearing from many folks across finance industry that Claude for Excel is blowing their minds. The agentic coding takeoff but for other fields is coming in 2026.

We removed ~80% of the Claude Code system prompt for our newest models, this is what we've learned about writing system prompts, skills and Claude.MDs for them. http://x.com/i/article/2080703729385512960

The new rules of context engineering for Claude 5 models

I’ve written previously about how to best prompt the newest generation of Claude 5 models and work with them iteratively to discover what you want to build. But when you send a message to Claude, the

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RT @claudeai: The Claude Security plugin for Claude Code is now available in beta. Scan your changes for vulnerabilities before you commit, or run a full scan across your codebase, all from your terminal on the Claude inference you already run.

Claude Code artifacts can now call MCP connectors, letting you build dashboards and apps that can fetch information and take actions for each viewer on demand. Available on Pro, Max, Team, and Enterprise plans. Not available on publicly-shared artifacts.

Claude Code on desktop now has an in-app browser. Claude can pull up docs, designs, or any other site. It can read, click through, and interact the same way it does with your local dev servers. It's sandboxed and configurable: you choose whether sessions persist.

RT @_catwu: Tomorrow at 10am PT I'm hosting a live walkthrough of how we progressed from single-player Claude Code to multi-player Claude Tag. Then, we're going deep on how Claude Tag actually works. AI used to finish your sentence. Then, it wrote entire features.

This is pretty epic

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · 4w ago

RT @jarredsumner: Rewriting Bun in Rust https://bun.com/blog/bun-in-rust

http://x.com/i/article/2074204645845839872

Getting started with loops

There’s a lot of talk right now about "designing loops" instead of prompting your coding agent. If you spend some time on X trying to pin down what a loop actually is, you'll come across multiple

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This is our first time telling the story of how we first built and launched Claude Code, starting with its origins in Anthropic safety research. So much more to do. We are 1% done.

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · last mo.

RT @claudeai: We've put together a short history of how Claude Code came to be, told by the people who built it and the early users who helped make it what it is today. https://www.anthropic.com/features/making-of-claude-code

Artifacts in Claude Code have been life changing. Excited to expand to Pro and Max!

ClaudeDevs [UNOFFICIAL]@claudedevs-mirr.selfhosted.social · last mo.

Artifacts in Claude Code are now also available on Pro and Max plans. Ask for an artifact, Claude writes the code, publishes it live to claude.a‍i, and updates it in real time while it keeps working. Pages are private to your account and fully self-contained.

Now that Fable 5 is ready to build (again), we've reset everyone's 5-hour and weekly rate limits.

Agree

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · last mo.

RT @paularambles: actually insane stuff happening here

You asked, we listened. Claude Desktop on Linux is here! Download link: https://code.claude.com/docs/en/desktop-linux

ClaudeDevs [UNOFFICIAL]@claudedevs-mirr.selfhosted.social · last mo.

Claude Desktop is now available on Linux (Ubuntu and Debian) in beta. Alongside the browser and terminal, you now get a first-class desktop experience with Claude Code, Claude Cowork, and chat on all paid plans.

RT @claudeai: Claude in Microsoft Foundry is now generally available, hosted on Azure. Azure customers get Claude Opus 4.8 and Claude Haiku 4.5, with Azure authentication, billing, and commitment retirement.

In the next version of Claude Code: subagents run in the background by default, so you can keep talking to Claude while your subagents work If you want your agent to run in the foreground, just tell Claude

We're launching Claude Tag today. Tag Claude into Slack and it works in channel with you. It’s proactive, multiplayer, with its own identity and memory. But it’s not just a bot in Slack. Over the last few months, it’s totally changed how we use Claude

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · last mo.

RT @claudeai: Introducing Claude Tag, a new way for teams to work with Claude. In Slack, Claude joins as a team member with access to the channels and tools you choose. Tag Claude in and delegate tasks to it while you focus on other work.

Cool way to use Claude Code: deciphering Linear A, a 3500 year old written language from Crete https://aiclambake.com/clamtakes/linear-a/ Hope this holds up in peer review! 🤞

I've been using Artifacts in Claude Code for everything: visual explanations of tricky code, system diagrams, quick previews of a few animation options, data analyses and dashboards I share with the team. They are a game changer for how I work with Claude. Can't wait to hear what you think!

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · 2mo ago

RT @claudeai: New in Claude Code: Artifacts. Interactive pages built from your session, like a PR walkthrough or a living project dashboard, shared with your team at a private link. Available in beta on Team and Enterprise plans.

RT @claudeai: New in Claude Design: it stays on brand with your design system across projects, lets you edit directly on the canvas, syncs with Claude Code, and connects to more of the tools you already use.

/goooooal ⚽

RT @aaronli: claude fable 5 has solved CAD I asked it to make a model of a V8 engine It came back to me with a fully working model in under 10 minutes

RT @arakharazian: NEW: Ramp AI Index for June 2026 1. We expected OpenAI to gain on the launch of Codex. It held flat in business adoption last month. 2. Anthropic grew 2.5% points to 41% of firms. It's now driving new AI adoption with never-adopters.

Hello from Code with Claude Tokyo!!

RT @DarioAmodei: Today I'm publishing a new essay, Policy on the AI Exponential. AI is progressing extremely fast—much faster than the policy process was built to handle.

Enjoy!

ClaudeDevs [UNOFFICIAL]@claudedevs-mirr.selfhosted.social · 2mo ago

We've reset 5-hour and weekly rate limits for all users. Enjoy Fable 5!

This is a super exciting release - Claude Fable 5 is the same underlying model as Mythos but with added safeguards.

Retweeted by Andrej Karpathy [UNOFFICIAL]@karpathy-mir-rt.selfhosted.social · 2mo ago

RT @claudeai: Fable 5 is state-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, scientific research, and vision. The longer and more complex the task, the larger Fable 5’s lead over our other models.

RT @levie: If you thought AI progress was slowing down, well here's the immediate answer to that. Huge jump in capability across the board. This is going to deliver major improvement in agents across almost all knowledge work categories.

Retweeted by Boris Cherny [UNOFFICIAL]@bcherny-mir-rt.selfhosted.social · 2mo ago

RT @claudeai: Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.

How do you get Claude Code to check its own work before handing it back? Watch how you can encode your manual checks so Claude closes its own feedback loop: https://x.com/claudedevs/status/2061900434722496604

Just landed nested subagent support in Claude Code Starting to experiment more with agents kicking off agents as a way to better manage context. Capped at depth=5 to start, going out in today’s release. Lmk what you think!