World models go mainstream

Good morning, AI enthusiasts. We have heard loads of commentary about world models being the long run, but the general public has had few ways to meaningfully access them.

AI ‘godmother’ Fei-Fei Li just modified that with World Labs’ Marble, an editable 3D environment generator that would finally carry ‘spatial intelligence’ from research hype into real creative workflows.

In today’s AI rundown:

• Fei-Fei Li’s World Labs launches Marble

• OpenAI’s GPT 5.1 with latest personality presets

• Use ChatGPT Projects to onboard latest hires

• OpenAI battles court order on ChatGPT logs

• 4 latest AI tools, community workflows, and more

LATEST DEVELOPMENTS

WORLD LABS

🌎 Fei-Fei Li’s World Labs launches Marble

The Rundown: AI ‘Godmother’ Fei-Fei Li’s World Labs just released Marble, its first industrial world model that generates persistent 3D environments from text, images, videos, or 3D layouts, positioning it ahead of rivals like Google’s Genie and Decart.

The main points:

• Users can each create latest worlds via text, image, and video prompts or edit, mix, and expand on existing ones to make granular changes.

• The platform lets creators export worlds as Gaussian splats, meshes, or videos, allowing to be used and import into gaming, VFX, and VR workflows.

• The model is now generally available after its initial September release in preview, offering each freemium and paid tiers starting at $20/mo.

• Marble coincides with Li’s essay on spatial intelligence, saying world models are an important step forward from LLMs without grounding in physical space.

Why it matters: While areas like gaming and VR could be the primary use cases to come back to mind, the list of applications is limitless — from simulated environments for robotics, architecture design to cinematic world constructing. Like image and video models, world models feel like a tool that’s going to be in lots of workflows across domains very soon.

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OPENAI

👋 OpenAI’s GPT 5.1 with latest personality presets

The Rundown: OpenAI just rolled out GPT-5.1, an upgraded version of its flagship model that emphasizes a more conversational tone and latest user customizations — introducing eight personality presets alongside improvements to reasoning speed.

The main points:

• The discharge includes 5.1 Fast, which OAI describes as warmer and more instruction-focused, and Considering, which upgrades efficiency and clarity.

• Users can now select from eight tone presets (Default, Skilled, Friendly, Candid, Quirky, Efficient, Nerdy, and Cynical) to steer and customize the model.

• The corporate also introduced experimental characteristic tunings like emoji use, warmness, and response scalability, available via ‘Personalization Settings’.

• OAI didn’t provide benchmarks for the 5.1 rollout, only showing a chart comparing the model’s time spent on easy vs. hard tasks in comparison with GPT-5.

Why it matters: The GPT-5.1 rollout is an odd one for OAI, feeling rushed with less hype, benchmarking, and fanfare than a typical release. This may occasionally signal a push to get ahead of a rival release (any day now, Gemini 3), or it’d just be a shift towards a smaller, more incremental update cadence between full reveals like Google and others.

AI TRAINING

🤝 Use ChatGPT Projects to onboard latest hires

The Rundown: On this tutorial, you’ll learn learn how to use ChatGPT Projects to construct a non-public, shareable workspace with uploaded SOPs, custom instructions, and project-specific memory for onboarding latest hires easily.

Step-by-step:

1. Open ChatGPT, enable the sidebar, select “Projects,” then “Latest project,” and name it (e.g., “Onboarding”)

2. Upload your SOP files to the Project, balancing context fastidiously to avoid overloading the AI’s memory

3. Share the Project by adding your latest hire’s email; they’ll access the workspace with all files, chats, and memory intact

4. Latest hires start with a kickoff prompt using Dictation mode: “I’m a brand new hire. Role: World models go mainstream
   . Goal: [objective]. Don’t start yet. First, ask clarifying questions on my role before onboarding”

5. Proceed chatting for targeted answers from uploaded SOPs, then share specific chat threads by copying the chat link

Pro Tip: Use dictation mode to work faster, limit the memories to that Project only, and supply barely enough context without overloading the context window.

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OPENAI & THE NEW YORK TIMES

🏛️ OpenAI battles court order on ChatGPT logs

The Rundown: OpenAI is pushing to appeal a ruling that requires the AI leader handy over 20M anonymized ChatGPT conversations to the Latest York Times as a part of an ongoing copyright lawsuit, calling the request an “invasion of user privacy.”

The main points:

• A judge ruled that the requested chat logs were appropriate discovery material, saying OAI’s de-identification process already protects users’ privacy.

• The NYT originally requested 1.4B chats, before narrowing to a random sample of 20M from Dec. 2022 to Nov. 2024 to search for potential copyright violations.

• OpenAI goals to remove the order in a letter to the court, also publishing a blog publicly detailing its stance on user privacy and the “baseless lawsuit.”

• OpenAI argued that “99.99%” of the transcripts haven’t any connection to the copyright claims, calling the request a “speculative fishing expedition.”

Why it matters: OAI continues to fight, nevertheless it seems like the court has made up its mind — though positioning the problem as a violation of user privacy is a superb method to swing consumers in your side. While these anonymized chats will likely be within the hands of the NYT eventually, ‘AI confidentiality’ feels able to turn out to be a much bigger discussion.

QUICK HITS

🛠️ Trending AI Tools

• 🤖 Tiger Data – AI-Native Agentic Postgres for iterative Agents — smart MCPs, Vector search & Forkable infra. Try the CLI free*

• 🌎 Marble – Create persistent 3D worlds from images, videos, and text prompts

• 🤖 GPT-5.1 – OpenAI’s upgraded model with personality customization

• ⭐️ Iconic Marketplace – ElevenLabs licensing platform for celebrity voices

*Sponsored Listing

📰 Every little thing else in AI today

Anthropic announced a large $50B investment in U.S. AI infrastructure, constructing out the corporate’s first custom data centers in Texas and Latest York starting in 2026.

Baidu released ERNIE-4.5-VL-28B-A3B-Considering (they usually say OAI needs work on naming!), a multimodal reasoner that claims to beat GPT-5 high and Gemini 2.5 Pro on visual benchmarks.

ByteDance’s Volcano Engine launched Doubao-Seed-Code, an AI coding assistant that matches Claude Sonnet on benchmarks while undercutting rivals by 60% in price.

Even Realities unveiled G2, a line of smart glasses with a ‘spatial display’ that projects info at different visual depths and an R1 control ring for gesture-based interactions.

Weibo AI open-sourced VibeThinker-1.5B, a model reportedly trained for just $7,800 that shows strong performance on math, coding, and reasoning at a tiny size.

COMMUNITY

🤝 Community AI workflows

Every newsletter, we showcase how a reader is using AI to work smarter, save time, or make life easier.

Today’s workflow comes from reader Atanas N. in London, U.K.:

“As a Data Manager, I noticed a recurring issue: marketing often needs facts from our research reports for content or PR, and they’ll ask the research team, which is busy with other priorities. I built an answer using Zapier agents. Each agent is trained on the most recent version of a report. I also created a classifier agent that routes inquiries to the appropriate report agent.

I published the whole lot in Microsoft Teams and arrange a shared chat. Now marketing can ask any query and get an quick answer with a citation to the precise page and chapter. Even the CEO uses it to quickly check facts.”

How do you employ AI? Tell us here.

🎓 Highlights: News, Guides & Events

• Read our last AI newsletter: Meta’s chief AI scientist maps his exit

• Read our last Tech newsletter: Musk wins $1T pay package

• Read our last Robotics newsletter: Apple’s $133B humanoid moonshot

• Today’s AI tool guide: Use ChatGPT Projects to onboard latest hires

• RSVP to next workshop @ 1PM Friday: AI Essentials for Leaders & Managers

See you soon,

Rowan, Joey, Zach, Shubham, and Jennifer — the humans behind The Rundown