The researchers say a newly found “J-space” holds Claude’s unspoken thoughts and “emerged on its own” during training — a structure that mirrors leading theories of how the human brain handles conscious thought.In today’s AI rundown:
- Anthropic finds a hidden workspace inside Claude
- Tencent open-sources small, powerful Hy3
- Build any mobile app idea in 15 minutes with Replit
- Kyutai’s AI dreams up a playable Rocket League
- 4 new AI tools, community workflows, and more
Anthropic finds a hidden workspace inside Claude
Image source: AnthropicThe Rundown: Anthropic just published research showing that Claude does its thinking in a small, internal “workspace” resembling what neuroscientists credit for human conscious access, with researchers saying the area wasn’t programmed but “emerged on its own.” The details: - Anthropic found ‘J-space,’ an internal area acting like Claude’s internal notepad, which holds active concepts the model uses and steers while thinking.
- J-Space is different from chain-of-thought text, with these internal hints staying off-screen even when they help direct Claude’s next answer.
- Editing the unspoken thoughts changes answers: swapping an internal “spider” pattern for “ant” during a question about legs flipped its response from 8 to 6.
- When J-space was deleted, Claude still chatted and recalled facts, but multi-step problem completion collapsed, showing where harder thinking happens.
Your AI agents need context
The Rundown: Slack is the coordination layer where AI agents access conversational history, workflow signals, and business context — so they expand capacity instead of creating risk. New IDC research shows 66% of developers have already moved AI agents into production.In the white paper, you’ll discover:- Why context determines if AI agents succeed or fail
- How Slack reduces coordination overhead for developers
- Why Slack is built to orchestrate multi-agent work
Tencent open-sources small, powerful Hy3
Image source: TencentThe Rundown: Chinese tech giant Tencent’s Hunyuan just promoted its Hy3 model out of an April preview and into a full open-source release, with benchmark results that claim to rival “flagship open-source models with 2-5x parameters.” The details:- Hy3 only uses a small slice of its parameters to work on each request, letting it run on under half the hardware needed for Zhipu’s much larger GLM-5.2.
- GLM-5.2 still beats Hy3 across coding tests like SWE-bench, though Hy3 tops open rivals on web research and tool use in Tencent’s own testing.
- The release features a permissive Apache 2.0 license, avoiding regional bans of earlier Chinese models that left those in the EU, UK, or S. Korea locked out.
Build any mobile app idea in 15 minutes with Replit
The Rundown: Learn how to turn an app idea into a Replit prototype to test on your phone. Define one user flow, give Replit Agent a focused prompt, preview with Expo Go, then improve the weakest part.Step-by-step:- Install the desktop app from replit.com/desktop, and download the Expo Go app to your phone (for app testing).
- Before building, define the smallest version that proves the idea. Here is the example prompt from the video: “Help me write a PRD for a playlist-themed Pomodoro app. I dictate tasks, AI turns them into Pomodoro sessions, and I can skip tasks like songs. Include design requirements, core features, and five simple names. Do not choose the tech stack.”
- Copy the PRD into Replit, choose the mobile app option, and ask Agent to build the first version. Keep it focused on the main flow, not login or payments.
- When the app is ready, open preview, scan the QR code, and run it through Expo Go. Tap the main screens and note what feels unfinished.
- Ask Replit for one targeted improvement, such as clearer confirmation copy or stronger trust signals. Preview again before adding features.
Close the AI performance gap
The Rundown: 87% use AI at work. Only 13% see a significant impact. Guest Lectures at Glean Academy returns for a third season, turning the Work AI Index 2026 into a practical, three-part series for leaders who want to close the performance gap. Hear AI researchers and experts at MasterCard, Target, Emory University, and more.In the series, you’ll learn:- How to avoid the hidden labor that AI creates
- How the best teams design effective human + AI routines
- What high-performance AI leaders are doing to set themselves apart
Kyutai’s AI dreams up a playable Rocket League
Image source: Kyutai and General Intuition The Rundown: Kyutai and General Intuition just released MIRA, an open-source world model built with Epic Games that runs live 2v2 Rocket League for four players — generated entirely inside a neural network with no game engine underneath.The details: - MIRA picked up the game from 10K hours of footage of AI bots playing each other, with zero human gameplay or player data anywhere in the training.
- Despite not having a physics engine or graphics code, MIRA renders details like boost meters and crashes, while keeping all screens in sync on a single GPU.
- Its memory only spans about four seconds, so when a goal replay rolls, MIRA hallucinates convincing footage of a goal that never actually happened.
- The game runs at 20 frames per second on a single Nvidia GPU, with the teams open-sourcing the code, training data, and a playable demo.
Trending AI Tools
Hy3 - Tencent’s new open-source model for cheap, reliable agent deployment
Nano Banana 2 Lite - Google's high-volume image model that generates pictures in just four seconds
Seed Audio 1.0 - ByteDance's model for generating speech, music, and SFX in one pass
ZCode- Z AI’s agentic coding environment tuned for GLM-5.2
Everything else in AI todayElon Musk’s xAI officially rebranded to SpaceXAI, following the company’s February merger that valued the AI lab at $250B. Illinois Gov. JB Pritzker signed the first U.S. state law forcing big AI developers to undergo annual third-party safety audits and reporting, with backing from both Anthropic and OpenAI. OpenAI’s Tibo Sottiaux revealed that the company’s coming GPT 5.6 ‘Ultra’ variant will be available in Codex, with the model family expected to be released this week. ByteDance and Alibaba are ending AI companion features in Doubao and Qwen, coming ahead of a July Beijing rule that targets chatbots and emotional dependency.Sotheby’s is auctioning off the “Jensen Jacket,” an autographed leather jacket previously worn by Nvidia CEO Jensen Huang, with an estimated final bid of $40–60K.COMMUNITY
Community AI workflowsEvery newsletter, we showcase how a reader is using AI to work smarter, save time, or make life easier.Today’s workflow comes from reader Anonymous:“I've been studying Spanish and am always looking for ways to help me remember new vocabulary and phrases. One fun method I've been using lately: I use MacWhisper to make a transcript of a Pimsleur language lesson from the MP3 file, drop that into Claude with instructions to craft the lyrics to a catchy Latin pop song using only the vocabulary in the transcript, and then paste those lyrics into Suno to make the song. I now have a growing playlist of catchy Spanish-language songs that remind me of past lessons, help me with pronunciation, and prepare me for learning even more.”How do you use AI? Tell us here.
Highlights: News, Guides & Events- Read our last AI newsletter: Meta sizes up GPT-5.5 with Watermelon
- Read our last Tech newsletter: Sony kills the game disc
- Read our last Robotics newsletter: This $8K robot can do your laundry
- Today’s AI tool guide: Build any mobile app idea in 15 minutes with Replit
- RSVP to next workshop on Wednesday: Create short form videos with AI
Source: https://www.therundown.ai/p/the-part-of ... body-built