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- Anthropic Unveils Fable 5.2 & Mythos 5.2
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Welcome to another edition of AI PlanetX.
Claude’s 1,000 AI agents build a laptop OS in eight days; Meta tops agent tests as ByteDance advances AI image editing.
Inside This Edition: 💎
Hottest AI News
Top AI & SaaS Tools
AI Tutorial: Analyze Business Opportunities with Gemini
Top AI & Tech News
AI Art Spotlight
Prompt of the Day: Fix Messy Vibe Coding Projects
Featured AI Video
Hottest AI News
Anthropic
Claude's 1,000 AI Agents Built a Laptop Operating System in Eight Days
Anthropic has launched Claude Fable 5.2 and Mythos 5.2, two versions of the same AI model. It says Claude agents built a bootable laptop operating system in eight days and formalized Fermat's Last Theorem in 30 hours.
Details:
Over 1,000 Fable agents wrote, tested and reviewed code for eight days. Their laptop OS boots with its own kernel, disk, keyboard and network drivers, storage, windows, login and installer
A separate 1,000-agent team formalized Fermat's Last Theorem in Lean in 28.7 hours. Given intermediate statements and prior lemmas, it created a checkable proof 7 times shorter
Fable also solved two open black-hole physics problems, designed 3 working electronic devices, and improved robot control. Anthropic says the models generate output 30% quicker
Fable is public with cyber and biology safeguards; Mythos needs verification. Both cost $8 per million input tokens and $40 per million output tokens.
50 Excel Hacks That Make Spreadsheets Work For You
Most Excel users waste hours on tasks that take experts minutes. The difference is not talent. It is knowing the right shortcuts.
These 50 Excel hacks from Kenji Explains cover the functions, formulas, and workflows that make spreadsheets work for you instead of against you.
Each one comes with step-by-step instructions and ready-to-use templates. Subscribe to Marketing Against the Grain and get all 50 free.
Here's what you'll get:
Time-saving shortcuts that eliminate the most common formula frustrations
Interface essentials most users never discover on their own
Game-changing functions for data analysis, automation, and visualization
Guided practice template so you can apply every hack immediately
The people who are fast in Excel are not smarter. They just stopped fighting the tool.
Get 50 Excel Hacks free when you subscribe to Marketing Against the Grain today.
Meta
Meta’s Muse Ember Outperforms GPT-6 Luna on Agent Tests
Meta just launched Muse Ember, a lightweight AI model charging $0.10 per million input tokens. It targets the repetitive jobs AI agents perform thousands of times, and its benchmark results challenge pricier rivals.
Details:
It handles tool calls, coding fixes, routing, extraction and long documents. It accepts text, images, audio and video, with a 1M-token context window and up to 512K output tokens
For requests up to 200K input tokens, pricing is $0.10 per million input, $0.50 output and $0.004 cached input. Above 200K, all three rates triple for the entire request
Meta reports 37.8% on AutomationBench vs GPT-6 Luna's 20.2% and Claude Haiku 5.5's 13.9%. Artificial Analysis scores Ember 36 at about $0.14 per task, nearly 3x cheaper than Haiku
Available on Meta Model API and Muse Code, Ember can handle routine tasks while larger models do the planning. That could make AI agents cheaper.
Top AI & SaaS Tools
Admaxxer (Life-time Deal): AI marketing analytics platform that tracks revenue attribution, measures ad performance, monitors AI search visibility, and manages Meta and Google campaigns
Exa Monitors v2: Periodically searches the web for latest, relevant updates and sends cited summaries or JSON to your webhook, costing $2 per 1,000 runs
Cedric: Virtual teammate for startups that automates tasks like meeting notes, business reports, research, marketing, customer follow-ups, and workflows across apps [F-R-E-E to Try]
TK by Medium: AI-powered writing and note-taking app by Medium that helps you organize ideas, improve drafts, and get AI writing assistance [F-R-E-E]
Latch ai: AI accounting workflow automation tool that learns tasks from accountants, handles them in existing software, and pauses for review [F-R-E-E]
The Dell Pro with built-in intelligence.
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AI Tutorial
How to Research Any Business Opportunity with Gemini Notebook
Most business ideas sound good at first. This tutorial shows you how to use NotebookLM to research any opportunity, compare real evidence, and build a source-backed brief before you commit time, money, or energy.
Write decision memo
Ask ChatGPT, Claude, or Gemini to create a one-page memo.
Include:
The opportunity
The options
The buyer and constraints
The key questions
Prompt example:
“Write a one-page memo comparing three AI receptionist vendors. Cover cost, features, setup effort, proof, and risk. Do not make a final recommendation yet.”Upload it to NotebookLM
Add the memo as your first source. Then ask:
“Extract the decision, options, criteria, missing evidence, and source types needed.”Create research map
Ask NotebookLM what evidence is needed before making the decision.
For example: pricing, features, reviews, integrations, setup, support, and risks.
Research each option
Use source discovery for each vendor.
Example searches:
“Smith AI pricing, features, reviews”
“Goodcall AI receptionist pricing and limitations”
“Slang AI features, integrations, customer proof”
Make one brief per option
Ask NotebookLM to summarize each option in the same format.
“Create a brief with best fit, proof, pricing, setup effort, risks, and what needs confirmation.”Compare options
Ask for a table comparing strengths, weaknesses, pricing confidence, setup difficulty, evidence quality, and risks.
Get recommendation
Ask for the winner, runner-up, not-recommended option, fragile assumptions, sales-call questions, and a 30-day validation plan.
Note: Never make the final decision from research alone. Use the brief to guide sales calls, demos, trials, or small tests.
Top AI & Tech News
ByteDance claims its Seedream 5.5 AI can edit the same image 100 times while keeping untouched details intact and generating transparent-background assets
Instagram's AI Effect Builder lets users create and share custom Stories filters simply by typing prompts, without coding or design skills, starting with US adults
Apple is charging $49.99 for additional cloud AI usage in Logic Pro when subscribers hit their monthly limits, with more creative apps expected to follow
OpenAI has built an AI kill switch that can stop its research models from generating further output within 35 seconds of a shutdown command
AI Art Spotlight
Create Your Own Photo Like This Using the Prompt Below:
2x2 grid, 16:9, do this for 4 weird jobs that are real: Anchor: A top-down knolling flat-lay of objects associated with [Theme], densely filling the frame ::4 Void Logic: The objects deliberately leave a clean empty silhouette of [Master Shape] in the center — the negative space reads as the image, the objects as its surround. Infer 30–40 items packed to the edge of the void ::5 Composition: Tight even packing everywhere except a crisp blank shape, [Background Color] showing through the gap ::3 Material Physics: Real objects, consistent matte finish, soft uniform shadows ::2 Illumination: Flat overhead softbox, no glare ::2 Render Stack: Knolling photography, figure-ground flat-lay, clever negative-space design ::1 Negative: [objects spilling into the void, fuzzy gap edge, the shape filled with objects, overlap, tilt, off-theme items] :: -1Model: ChatGPT Images 2.6 / Nano Banana 2.1
Prompt of the Day
This Prompt Fixes Your Messy Vibe Coding Projects
This prompt helps you find hidden problems in your vibe coding projects by identifying how different parts of your app manage states and transitions. It guides AI tools like Claude Code or Codex to improve your app's user experience, make the code easier to maintain.