Maitrix.org

Claude Code can now build things in a simulated physical world!🤖🏙️ With SimWorld, coding agents can construct buildings, plan cities, or even create video games inside a realistic simulation on Unreal Engine. Just write a prompt, your agent will call tools, retrieve assets, plan scenes, and test physics autonomously. Demo platform coming soon so everyone can try it. Stay tuned. 🚀

A SimWorld coding agent can now create its own tools and skills on the fly. We challenged it with BaGuaZhen (八卦阵 Eight Trigrams), an ancient Chinese formation that is difficult to build from scratch because of its precise spatial structure and multi-step coordination. Instead of failing with brute force, the agent wrote reusable components for itself: Tools: Bagua Wall Segment, Bagua Trigram Line Skills: Bagua Wall Segment Skill, Bagua Trigram Line Skill Each tool is paired with a skill that teaches the model how to use it. Without skills: it fails. With self-built skills: it organizes the full structure. The exciting shift is this: agents are starting to generate capabilities, not just outputs.

🌊🏝️🌉Coding agent performing spatial reasoning to construct complex scenes Powered by SimWorld Studio (link in the thread)

🚨New Release: SimWorld Studio — Vibe Code the Physical World Today we open source SimWorld Studio, a coding-agent platform for building interactive physical worlds. Just chat with Claude Code to create environments, place assets, test physics, and edit everything live. Build worlds as easily as just writing prompt.

What if coding agents could build entire virtual worlds? 🌍🏙️ SimWorld makes it possible — enabling agents like Claude Code 🤖 to generate and interact with scenes directly inside an Unreal Engine simulation 🎮 World simulation for embodied agents just became much easier and more accessible 🚀 Stay tuned — more models and capabilities coming soon ⚡️

🚀Excited to share that we bridge the connection of Clawbot & Simworld! 🧩We are motivated to move beyond isolated toy tasks and into a shared physical world with routines, interactions, and coordination. 🚧Lightweight setup: plug in your own agent easily!

🤖Clawbots just moved into Embodied City inside SimWorld. They wake up. Go to work. Run errands. Talk to each other. All inside a shared physical world. This isn’t scripted — it’s autonomous agents living a daily routine. And you can spin up your own agent in minutes.

🤖Clawbots just moved into Embodied City inside SimWorld. They wake up. Go to work. Run errands. Talk to each other. All inside a shared physical world. This isn’t scripted — it’s autonomous agents living a daily routine. And you can spin up your own agent in minutes.

1/9 Softmax is the enemy of diversity in reward-maximization RL like GRPO. 📉 Recent analysis reveals: As RL boosts a "correct" token, Softmax automatically suppresses all others to maximize reward. This mechanism aggressively drives down entropy. This is Mode Elicitation: trading creativity for a local optimum. To fix this, we need to escape the discrete space. 🧵👇

🤖 Can an agent earn money by delivering food in a realistic 3D city? 🚚 We present 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆𝗕𝗲𝗻𝗰𝗵, a realistic embodied benchmark for long-horizon food delivery. ⚖️ To earn more, agents must make trade-offs under multiple, interacting constraints (e.g., deadlines, expenses, and battery levels). 😮 Surprisingly, even top models (e.g., Gemini-2.5-Pro, Claude-3.7-Sonnet) earn 𝗳𝗮𝗿 𝗹𝗲𝘀𝘀 per hour than humans. They still make basic mistakes, like packing hot meals together with ice cream. 👇 Project website + more details in the thread ...1/

🚨 New from SimWorld: DeliveryBench A multimodal embodied benchmark where LLMs work as food-delivery agents in a living 3D city 🛵🍕 🤔Why it’s hard: • long-horizon planning with compounding consequences (profit, delays, ratings) • real-world constraints (traffic, weather, time) • multi-agent competition and collaboration 🧐What we observe: • risk-averse agents idle or detour, losing profit • aggressive agents rush deliveries and break constraints • agents compete for orders but fail to coordinate routes or timing DeliveryBench makes these dynamics measurable.💡💸