Cofounder at @RaylineAI. Building ARC, an SLM purpose-trained to choose the best model for every task. Stanford MBA/MS. RedSox/movies fan, first of his name.

Boston, MA
Joined August 2009
Very excited to launch @WorkshopAI. The idea is to make it much easier to build useful things with AI. Connectors to your data, built-in AI without API headaches, and one-click publishing, including private apps. You can do that in the cloud or on your desktop, with local models that are free, private, and offline — and we even help you pick the right one for your hardware. Try it out today and let me know what you think!
Introducing Workshop: cloud + on-device agentic AI. And to celebrate, we're giving away $250k in @GeminiApp AI credits. (details below). The future of AI work is neither cloud-based nor local. It's both. In Workshop Cloud, you can use agents powered by frontier models like @claudeai and/or open source models like @Zai_org's GLM-5 to build internal tools, dashboards, and AI web apps. Or, breeze through tasks like managing your Google and Meta Ads. In Workshop Desktop, you can do all the same right on your computer, plus make desktop apps, mobile apps, and 3D creations. Our favorite part? You can power the full agent experience with local models like Qwen 3.5 family on your computer. Fully offline. 2026 is the year in which local models for agentic tasks will become viable for mainstream use. But the setup for tools like OpenClaw is like setting up Linux from scratch on your computer. Workshop Desktop is one-click to install on Windows, Mac, and Linux. It recommends which open source model you should use for your hardware and lets you download and run it right in the app. And its agent harness allows you to chat, create websites, build personal utilities, and analyze data. 100% offline. Or multitask with AI models in the cloud while running other agent threads locally. Start in Workshop Cloud when you want flexibility and speed. Download your project and continue in Workshop Desktop when you want local files, privacy, and/or better performance on large code bases. Publish from either. The agent tooling space is maturing and discerning users have come to expect a lot from their tools. We've packed Workshop with features to help you 10x your productivity. - Native support for skills - Autocompaction for seamless context management - Built-in AI for your apps - Dozens of connectors, like Google Drive, Big Query, and Supabase - dbt integration to ground your dashboards in your semantic layer - Native Github integration - Private app deployment - ... and more (+ we're shipping super fast) To access the free credit offer, RT this post and reply with "Workshop". Make sure you are following us so we can DM you the instructions to redeem. - First 100 to RT + comment get $500 in credits. - Everyone else gets up to $250 And thanks to our partners @modal, @GeminiApp, and @Zai_org! workshop.ai
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What incredible things we can build!
Cosmic neutrinos with extremely high energies are very rare, so an enormous volume of ice is needed to observe an adequate number of collisions. The IceCube Neutrino Observatory covers an entire cubic kilometre and was finished in 2011. Researchers soon discovered the first high-energy neutrinos and, a few years later, could publish their discovery of neutrinos that must originate far outside our solar system. The search for the universe’s neutrino sources could begin in earnest. Francis Halzen has received the 2026 #NobelPrize in Physics for his decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin.
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2024*, 2025*
The Dodgers' local-TV deal is a profound competitive advantage. Because of a bankruptcy-court ruling, the team will shield more than $1.3 billion from rev sharing over 25 years. What you might not know: They further monetized it through debt deals with Mark Walter-owned insurers.
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Josh D'Amaro loves Disney Parks!
THE YETI IS GETTING FIXED.
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YES! (Says the Disney adult that has been to Disneyland Paris once 14 years ago)
Blast to the past 🚀 Star Wars Hyperspace Mountain will close at the end of 2027, making way for Space Mountain - De la Terre a la Lune at @DisneylandParis 💫 #D23
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Seeing this live I literally went "LOOK AT HIM GO!"
Mbappe’s full sprint actually made me say “holy shit” here lol
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¿Y si sí? ¡Viva Mexico!
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Eitan Rovero-Shein retweeted
little baby Babylon
normalising naming your child after a 10/10 film
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Eitan Rovero-Shein retweeted
New in Workshop: Auto Mode, powered by @RaylineAI. Workshop already gives you access to frontier, open-source, and local/on-device models. But the real challenge is knowing which model provides the best cost/quality ratio for which sub-task. With Auto Mode, you don’t have to choose manually. In a single conversation, Workshop can use many different models together — routing each step to the model that is best fit for purpose across quality, speed, and cost. That routing layer is Rayline. You can now select Auto Mode directly from the model picker in Workshop. And if you want to learn more about Rayline as a standalone product, check it out at rayline [.] ai
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Have you been wanting to use Claude Code with non-Anthropic models? And to be able to intelligently route to the best model for each sub-task? Oh, and open-source? We got you.
We open-sourced a local gateway for Claude Code. The goal is simple: keep the Claude Code experience you already know, but use it with the models you want. With the open-source gateway, you can connect Claude Code to other models using your own provider keys, whether that’s directly with model providers, through something like OpenRouter, or with local models running on your machine. This is the more configurable version of what Rayline managed gives you out of the box: smarter model selection while preserving the coding-agent workflow you already like. Rayline managed handles routing + inference for you. The open-source gateway gives you control and lets you bring your own model connections. GitHub repo link in thread. [Example video below: Claude Code running with hybrid cloud + on-device AI. The main agent runs Opus in the cloud and orchestrates an Explore subagent that Rayline Local routes to a model running fully on device (Qwen3.6-35B-A3B, Q4), seamlessly, in a single session.]
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You shouldn't need to replace Claude Code to make Claude Code 60–90% cheaper. That’s why we built @RaylineAI. Rayline is a model router that plugs into the harness you already use and routes each subtask to the best model capable of completing it successfully. Models like Opus and GPT 5.5 can stay focused on orchestration, complex reasoning, and long-range planning, while faster and less expensive open-source or on-device models handle the rest. Rayline can route across frontier, open-source, and on-device models. It abstracts away the complexity of knowing which model to use, when to use it, or what your hardware can support. All it takes is a one-line change on your Claude Code settings. The result is the experience and quality you already know and love, at a fraction of the API cost. This grew directly out of what we learned building @WorkshopAI. One of the things users value most is the ability to work across models from different providers. But we kept hearing the same question: can I use this intelligence inside the tools I already use? Rayline is our answer. Its ML router optimizes for the lowest cost of a successful outcome, not simply the cheapest model. Because a cheap model that fails, retries, or spins its wheels isn’t actually cheap. Frontier models are incredibly valuable. They just shouldn’t be doing all the grunt work. Rayline is available today at Rayline [.] ai. Claude Code first. Codex next!
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Eitan Rovero-Shein retweeted
A cappella Mexican national anthem goes extremely hard 🇲🇽 Let the World Cup begin 🍿
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.@Benioff makes the pitch for @RaylineAI flawlessly. Every part is there ... - intelligent model routing, - routing across cloud and on-device, - the immediate focus on coding but the broader need beyond ... Added some callouts for clarity :)
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Eitan Rovero-Shein retweeted
Introducing Rayline: a model router built specifically for Claude Code. Claude Code's API rates are 8-10x its subscription rates. Most of those tokens are going to easy subtasks. Plug in Rayline, and subagents get routed to open source and on-device models instead of burning Opus-level spend on grunt work. Quality holds. Costs drop 60-90%. What makes Rayline different: - Routes at the subagent/subtask level - On-device routing via MLX (Qwen 3.6 and others) - Built-in ML router trained for Claude Code tasks - Cloud fallback when Anthropic has outages - Works with OpenAI models inside Claude Code You keep using Claude Code exactly as you do today. Rayline handles the routing underneath. We're already routing billions of tokens per day for individual developers and publicly traded companies. Public beta is live now. Try it at Rayline[.]ai
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Eitan Rovero-Shein retweeted
Claude Code's API rates are 8-10x more expensive than its subscription rates. Most of those tokens are wasted spend. We built @RaylineAI to fix that. Rayline is a model router built specifically for Claude Code. You plug it in, and subagents get routed to open source and on-device models. Use Opus as your main agent overseeing grunt work delegated to open models. Quality holds. Costs drop 60-90%. The key insight: model routing belongs at the API layer, not the harness layer. Harnesses are converging. LLMs are becoming interchangeable. The control point is the gateway, and that's where enterprises need to manage spend without forcing teams to adopt new tools. What makes Rayline different from other routers: - Built specifically for Claude Code - Routes at the subagent/subtask level - On-device routing via MLX (Qwen 3.6 and others) - Built-in ML router trained for Claude Code tasks We've been thinking about this problem for a long time. We built model routing into @WorkshopAI months ago. Others launched similar things last week. Rayline is the first of its kind: a router built from the ground up for the coding agents you already use. We're already routing billions of tokens per day for individuals and publicly traded companies. Try it at Rayline[.]ai (p.s. Codex is next!)
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Eitan Rovero-Shein retweeted
Gemini 3.5 Flash is now in Workshop. Free for every paid plan today only! Unmetered until 11:59 PM UTC ⏳ Go build something amazing!
🤖 Made with AI
Welcome to Gemini 3.5 Flash, our most powerful model to date. It pushes the frontier of intelligence, speed, and cost putting 3.5 Flash in a class of its own. We spent the last 6 months making sure Flash is great for real world use cases. It's available everywhere now!
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Great week to try the Max plan in Workshop!
Gemini is free on Workshop for Max subscribers from May 12–20! Use Gemini for apps, workflows, internal tools, dashboards, agents, image tools, and more. Available for both existing and new Max subs.
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Want to win an election? Change your name. Live data from London's #electiontresult2026 shows candidates higher in the ballot get more votes than their party colleagues in the same ward 72% of the time. 17 candidates so far that missed out on a seat: ballot-order.workshop.build
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