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- 🌞 ChatGPT’s New Brain = GPT-5.6 Sol
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Plus: I Found a Way to Give Fable 5 Almost Infinite Memory. Smartest AI Second Brain I’ve Seen. Fable 5 alone is smart, but with Karpathy’s LLM Wiki, it becomes unstoppable.
ThursdAI is absolutely packed, again. GPT-5.6 Sol, Luna, Terra, Meta Muse Park, and more all landed at once. I’m still catching up, so here’s the fastest breakdown for you.
What's on FIRE 🔥
IN PARTNERSHIP WITH MODA
Moda is the AI design agent with taste
Moda's viral launch hit 4.4 million views in two days. Tens of thousands of professionals signed up. Startups, agencies, forward-thinking brands and top firms are now using Moda to create brand-aligned slides, ad creative, reports, social carousels and more.
Most AI tools tend to create what we call "AI slop": repetitions of the same colors, layouts and fonts. And when you try to fix it, you get stuck in a loop of re-prompting.
Moda is different. Drop in your website URL, and Moda learns your brand from the ground up: your colors, your fonts, your visual language. Then it helps you generate pro-quality slides, docs, and marketing assets.
The best part? Every layer is fully editable on a real canvas, and exports to powerpoint, PDF and more.
AI INSIGHTS
OpenAI fully released its GPT-5.6 model family to the public after a short limited preview to clear some U.S. government security checks. They’re ditching the usual number system and breaking the lineup into 3 distinct tiers: Sol, Terra, and Luna.
Sol: This is for complex coding and cybersecurity. It introduces a "max reasoning effort" dial and an "ultra mode" that actually farms work out to sub-agents. It’s built for heavy, end-to-end technical execution.
Terra: This is the middle-tier model for everyday work. It delivers the exact same performance as the older GPT-5.5, but it is twice as cheap.
Luna: The fastest and lowest-cost model of the group. It is designed for quick, high-volume tasks where speed and budget are the main priority.
OpenAI packed these models with their strongest safety features to date, spending weeks testing them against real-world cyber threats before release.
You will start seeing Sol automatically handle your heavy reasoning and complex tasks. Terra and Luna are available through the API, Codex, and ChatGPT Work, but they aren’t selectable in normal ChatGPT chats.
Meanwhile, GPT-5.5 Instant will stay on duty as the default for quick, everyday questions. According to early reviews from testers, users are starting to step into the role of managing automated AI loops.
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FABLE 5’S INFINITE MEMORY?
Andrej Karpathy, OpenAI co-founder, former Tesla AI director, and a member of Anthropic's pre-training team, published a GitHub Gist called llm-wiki.md. It went viral almost immediately.
The thing is, it's not code or a product. It's a pattern, a single markdown file designed to be copy-pasted into an Fable 5 or Codex, which then builds the actual system for you based on your specific needs.
Raw data you drop in | What it becomes |
|---|---|
YouTube videos | Pages with summaries and key ideas |
Meeting transcripts | Takeaways, topics, and action items |
PDFs | Source notes and concept pages |
Articles | Linked concept and tool pages |
Tool mentions | Connections between related ideas |
In this guide, I’ll show you how to build an AI second brain with Claude Code, and Karpathy’s LLM Wiki system step by step, then show you why Fable 5 becomes so powerful once your data is routed the right way.
TODAY IN AI
AI HIGHLIGHTS
📅 Claude now has a Reflect feature, which recaps your monthly interactions with a personal summary. The beta rollout is available gradually. Follow this to create yours.
🚀 ChatGPT Work arrived as a new AI Agent, powered by Codex & GPT-5.6. It can take action across your apps and files, and turn a goal into finished work. See 6 use cases.
💸 AI/ML API gave Sol, Terra, Fable 5, Opus 4.8 the same 3 prompts (link test). The outputs looked surprisingly close, but Fable 5’s bill made the comparison awkward.
⚔️ "We've reset 5-hour rate limits for all users." Perfect moment. Instead of rushing to test GPT-5.6, users can play with Fable 5 again. Anthropic knew what it was doing.
🌐 OpenAI is shutting down Atlas after less than a year. Instead, it’s turning ChatGPT into a browser layer across Chrome, cloud agents that can complete tasks for users.
🤝 Elon Musk just admitted he was wrong about Anthropic and called Mythos/Fable the best model available. Friendly praise, or smart business? Here’s his direct reply.
👀 Microsoft breakup rumors were everywhere this week. Then OpenAI announced GPT 5.6 as the preferred model for Microsoft 365 Copilot. Does that settle the debate?
💰 Big AI Fundraising: Prime Intellect just raised $130M Series A to build an open superintelligence stack. It says over 6,000 customers already use its RL infrastructure, with annualized revenue surpassing $100M.
NEW EMPOWERED AI TOOLS
🎙️ Timbal AI builds fast, natural AI voice agents that can listen, reason, and respond in real time with surprisingly human conversations.
🛠️ Auriko helps you turn ideas into working apps using AI, making it easy to build, test, and launch projects much faster.
📊 Toyo creates polished presentations, documents, and visual content from simple prompts, saving hours of design and formatting work.
🛡️ PerfAI scans AI-generated apps for security risks, catches vulnerabilities early, and helps you ship safer software with confidence.
AI BREAKTHROUGH
Meta just dropped Muse Spark 1.1, and benchmarks put it beside GPT-5.5 and Opus 4.8. It’s such a major release for the company that Mark Zuckerberg actually logged into X to post about it for the first time since 2023.
Spark 1.1 focuses on multi-step reasoning. It’s built to handle complex processes, orchestrate digital workflows, and deploy new system features.
Meta is charging $1.25 per million input tokens and $4.25 per million output tokens. This puts it in the exact same competitive bracket as Claude Haiku 4.5 and GPT-5.6 Luna.
The model is highly optimized for large agentic workloads. If a team needs to fix bugs, orchestrate tasks across different external apps, or run massive code migrations, Spark is built for that exact job.
Even though Meta is entering this specific market a bit late, the aggressive pricing and focus on enterprise automation make it a serious competitor. In his rare post, Zuckerberg called Spark "a strong agentic and coding model at a very low price.”
This launch wraps up a massive week for AI updates. Between Meta launching their Muse Image model, the new Grok update from SpaceXAI, and OpenAI dropping the GPT-5.6 family, the landscape is moving incredibly fast.
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The AI Fire Team
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