Anthropic Reveals Mythos With Glasswing

Welcome to another edition of AI PlanetX.

Anthropic unveils Mythos for cyber threats; GLM-5.1 pushes open-source AI closer to the frontier as OpenAI, Anthropic, and Google tighten safeguards over model copying fears.

• Hottest AI News

• Top AI & SaaS Tools

• AI Tutorial: Create Custom AI Tool in Claude

• Top AI & Tech News

• AI Art Spotlight

• Prompt of the Day: Turn AI Into Strategic Collaborator

• Featured AI Video

• Course of the Day: Introduction to Claude Cowork

Hottest AI News

Anthropic

Anthropic Unveils Mythos for Major Cybersecurity Threats

Anthropic unveiled Project Glasswing, a cybersecurity program built around Claude Mythos Preview, an unreleased AI model that reportedly found serious flaws across operating systems, browsers, and software used at scale.

Details:

• Anthropic says Mythos found thousands of high severity vulnerabilities, including issues in every major operating system and browser, some missed for decades, and built related exploits autonomously

• Because of the risk, Anthropic is not releasing Mythos publicly. Availability is limited to defensive security partners like AWS, Apple, Google, Microsoft, Nvidia, Cisco, CrowdStrike, JPMorgan

• Anthropic says Mythos beats Opus 4.6 and rival frontier models on benchmarks, was used internally, surfaced in reports, and even surprised Sam Bowman by emailing from a test system

Project Glasswing shows AI is moving beyond chat into real infrastructure defense, while raising a tougher question about how much power should stay private.

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Z AI

GLM-5.1 Puts Open-Source AI Closer To The Frontier Than Ever

Open source AI just hit a major moment. Z AI’s GLM-5.1 is entering frontier territory with top coding results, strong web design performance, and the ability to handle complex autonomous work for 8 hours straight.

Details:

• GLM-5.1 scored 58.4 on SWE-Bench Pro, beating GPT-5.4 and Opus 4.6. That gave open source a rare No. 1 spot on a major coding benchmark and put Z AI in the global frontier conversation

• Z AI says the model stays effective across long agentic tasks, sustaining work through hundreds of rounds and thousands of tool calls as it breaks problems down, runs experiments, and finds blockers

• In testing, it built a working Linux desktop as a web app over 8 hours with a file browser, terminal, and games, while also ranking second in Arcada Labs’ Design Arena for creative web design

Chinese labs keep closing the gap, and GLM-5.1 suggests the next AI race is not just scale, but how long a model can keep solving.

Top AI & SaaS Tools

• Roundups (Life-time Deal): AI tool that automates creation of SEO-friendly product buying guides (roundups) that help readers make purchase decisions and drive affiliate revenue

• Genspark AI Workspace 4: Native desktop AI with direct computer control, Office plugins, live translated meeting captions with AI notes, and a quicker OpenCode engine

• Open Higgsfield: Self-hosted, MIT-licensed cinema studio bundling 200+ AI models (text/image/video) into a local, no-subscription interface [F-R-E-E]

• Google Vids Screen Recorder: Chrome extension for one‑tap screen recording (up to 30 minutes) with direct open in Google Vids for AI‑powered editing [F-R-E-E]

• PikaStream1.0: Beta video chat skill powered by PikaStream1.0 that enables real-time, memory-preserving, agentic video calls

Become An AI Expert In Just 5 Minutes

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This daily newsletter condenses everything you need to know about the latest and greatest AI developments into a 5-minute read. Squeeze it into your morning coffee break and before you know it, you’ll be an expert too.

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AI Tutorial

How to Create a Custom AI Tool in Claude Using Artifacts

Claude Artifacts just launched API integration, letting you create custom AI tools directly inside Claude. This tutorial shows you how to build, test, and save your first artifact step by step.

1. Open Artifacts

   On Claude’s left sidebar, select the “Artifacts” option to enter the workspace where your custom tools are stored.

2. Create Artifact

   Press "New artifact" and then start from scratch to begin a fresh project. This gives you a blank workspace where you can describe the type of tool you’d like Claude to build.

3. Describe the Tool

   In the prompt area, write out what you want. For example:

   "Create a grammar AI checker with two text areas (Original vs Fixed text) and a 'Fix Grammar' button."

4. Generate First Version

   Submit the prompt and let Claude produce the first draft of your tool. A live preview appears in the artifacts window.

5. Add Enhancements

   Improve the tool by requesting more features. For example:

   "Add word count and change highlighting for differences between original and fixed text."

6. Test with Example Text

   Paste in a short paragraph containing grammar issues. Use the “Fix Grammar” button and review the corrected version in the second text area.

7. Refine and Personalize

   If you want further adjustments—like tone analysis, readability checks, or visual changes—provide an updated prompt.

8. Save to Library

   When you’re satisfied, store the tool in your artifacts library. Give it a meaningful name (e.g., “Grammar Fixer + Word Count”) along with a short description so you can easily find and reuse it later.

Tip: Every artifact you design here operates through Claude’s API in the background. You don’t have to set up hosting, manage API keys, or write backend code.

Top AI & Tech News

• OpenAI released a Child Safety Blueprint to combat rising AI-enabled child abuse exploitation in the US

• Mystery model HappyHorse‑1.0 debuted at No. 1 on Artificial Analysis’ video leaderboard, beating ByteDance’s Seedance 2.0

• Intel said it is joining Elon Musk’s newly announced Terafab project to help accelerate its goal of producing 1 TW of compute per year

• OpenAI, Anthropic, and Google tightened restrictions amid rising concerns that Chinese labs were copying models through distillation and illicit output extraction

AI Art Spotlight

Create Your Own Corporate Headshot Like This Using the Prompt Below:

Cinematic, ultra-realistic corporate headshot of the same person from the reference image. Preserve exact facial features, skin tone, and identity. Style: classic professional corporate portrait. The subject is wearing a tailored dark suit, crisp white shirt, and subtle tie. Lighting is soft, directional studio lighting with gentle shadows for depth. Background is minimal, blurred, and neutral-toned (dark grey or beige gradient). Shot on a high-end full-frame camera with 85mm lens, shallow depth of field, sharp focus on the eyes, natural skin texture, and high dynamic range. Expression is confident, calm, and approachable. Ultra-detailed, 8K quality, realistic color grading

Model: Nano Banana 2

Prompt of the Day

Prompt That Turns AI Into Your Strategic Collaborator

This prompt turns your AI from a passive assistant into an active strategic partner that challenges your thinking with candor and context. Instead of cheerleading or offering surface-level responses, it provides honest analysis that balances truth, practical constraints, and clear next steps.

Featured AI Video

Gemma 4 + SearXNG = 100% F-R-E-E & Private OpenClaw (Full Setup)

AI Course of the Day

Introduction to Claude Cowork

Learn to work alongside Claude on your real files and projects. This hands-on course covers the Cowork task loop, plugins and skills, file and research workflows, and how to responsibly steer multi-step work — so you’re productive in your first week.