• AI PlanetX
  • Posts
  • Anthropic Launches Claude Fable 5.1

Anthropic Launches Claude Fable 5.1

OpenAI Astra Hits Critical Level

In partnership with

AI PlanetX

Welcome to another edition of AI PlanetX.

World Labs unveils a 3D world model; OpenAI flags Astra’s critical cyber abilities; Anthropic launches cheaper Claude Fable 5.1.

Inside This Edition: 💎

  • Hottest AI News

  • Top AI & SaaS Tools

  • AI Tutorial: Transcribe Meetings With Gemini 3.5

  • Top AI & Tech News

  • AI Art Spotlight

  • Resource of the Day: Cache Engineering - Cut AI Costs 10x

  • Featured AI Video

  • Weekly Growth Playbooks to Scale Smarter

Hottest AI News

Anthropic

Anthropic Launches Claude Fable 5.1 With Lower Costs and Less Friction

Anthropic launched Claude Fable 5.1 and Mythos 5.1, two versions of the same frontier model with different safeguards. Fable is broadly available; Mythos stays restricted to vetted cyber and life-science partners.

Details:

  • Cache reads are 75% cheaper, falling from $1 to $0.25 per million tokens, while base input/output stay $10/$50. Anthropic estimates ~25% typical savings and 45% for agentic work

  • Fable 5.1 improves coding, research and knowledge work, scoring 52.6% on Terminal-Bench-Science and 55.8% on Terminal-Bench 4.0. Anthropic also showed GPU optimization and Venus mapping results

  • Safeguards intervene less: ~60% fewer cyber false positives and 85% fewer biology interventions. Fable can find software flaws, while EFS keeps enterprise data in customer cloud

More than a benchmark jump, this release combines stronger models with lower agent costs, fewer unnecessary refusals, tighter privacy, and broader practical use.

100+ coding prompts top engineers use to ship 5X faster

Claude Code, Codex, and Cursor are on every engineer's tech stack. Most still treat them like a search bar and get average output back. Top engineers work from a system instead. These 100+ prompts are that system.

Sign up for The Code and get:

  • 100+ ready-to-use prompts built on real Claude Code, Codex, and Cursor workflows, so you ship in minutes instead of hours

  • The Code newsletter (5 min daily) to keep sharpening your AI-coding edge after the prompts land

OpenAI

OpenAI Astra Hits Critical Cybersecurity Level Ahead of Public Release

OpenAI says its upcoming Astra model is its first to reach a “Critical” cybersecurity threshold. It can autonomously find unknown flaws and build exploits, forcing OpenAI to restrict its strongest cyber abilities.

Details:

  • Astra scored 100% on ExploitBench and, in OpenAI’s newer internal test, found and used two zero-days. It also built browser escape and operating-system privilege-escalation exploit chains

  • OpenAI delayed Astra after the Hugging Face incident, though Astra was not involved. Safeguards include stronger refusals, sandboxing, abuse detection and chain-of-thought monitoring

  • Astra is coming, but its strongest cyber capabilities start with selected testers before Daybreak Blue. Fortune says early users include U.S. government and critical-infrastructure groups

OpenAI calls Astra its most aligned model yet, but outside validation is limited. Its launch will test whether those safeguards hold up in practice.

Top AI & SaaS Tools

  • Hostinger Bundle (Life-time Deal): This AppSumo Hostinger bundle gives you 1-year subscriptions to unlimited hosting, an AI agent, and AI email marketing for just $24 [combined value of $147]

  • ChatCut Desktop: Local AI video editor that connects to Codex or Claude Code, automates editing, and exports timelines to Premiere Pro, DaVinci Resolve, and CapCut [F-R-E-E to Try]

  • Google Pics: AI image creation and editing tool for Google Workspace, offering precise edits, text translation, collaboration, image variations, and integration with Slides, Docs, and Drive

  • CoAnimator: AI animation studio that helps you create product demos, launch videos, tutorials, and motion graphics by describing what you want [F-R-E-E to Try]

  • cloro: Unified API that lets you retrieve structured results from Google Search and AI search engines like ChatGPT, Perplexity, Gemini, and Copilot for SEO and AI visibility tracking [F-R-E-E to Try]

The Future of AI in Marketing. Your Shortcut to Smarter, Faster Marketing.

This guide distills 10 AI strategies from industry leaders that are transforming marketing.

  • Learn how HubSpot's engineering team achieved 15-20% productivity gains with AI

  • Learn how AI-driven emails achieved 94% higher conversion rates

  • Discover 7 ways to enhance your marketing strategy with AI.

AI Tutorial

How to Transcribe Meetings With the Latest Gemini 3.5 Transcribe

You can turn meeting recordings into useful notes without paying for a transcription tool. Gemini 3.5 Transcribe converts audio into accurate text, ready for summaries, decisions, and next steps.

  1. Open Gemini 3.5 Transcribe

    Open Google AI Studio and use gemini-3.5-transcribe for recorded meetings. For real-time transcription, Google also offers gemini-3.5-transcribe-live.

  2. Upload Meeting

    Upload your meeting audio. Gemini automatically detects 85+ languages and can handle conversations that switch between languages.

  3. Choose Transcription Mode

    Pick the mode based on what you need:

    • Smart: Cleans filler words, false starts, punctuation, and formatting.

    • Verbatim: Keeps the exact speech and supports speaker labels and word-level timestamps.

    For normal meeting notes, Smart is usually enough.

  4. Add Important Vocabulary

    If needed, add product names, acronyms, technical terms, or people's names as custom vocabulary to improve recognition.

    Note: custom vocabulary can't be used with speaker diarization or word-level timestamps.

  5. Generate and Check Transcript

    Run the transcription and quickly check:

    • Names and technical terms

    • Dates, numbers, and commitments

    • Speaker labels if using Verbatim mode

    Gemini can distinguish up to eight speakers in recorded audio.

  6. Turn It Into Notes

    Give the transcript to Gemini and use:

    Turn this transcript into clear meeting notes. Include a short summary, key points, decisions, unresolved questions, and follow-ups. Use information stated in the transcript.

  7. Extract Action Items

    Ask Gemini to turn the meeting into a clear task list:

    • Task

    • Owner

    • Deadline

    Prompt:

    Extract every decision and action item from this meeting. For each task, include the owner and deadline. If either wasn't mentioned, write "Not assigned" instead of guessing.

Note: Don’t turn on word-level timestamps unless you actually need them. Google notes that timestamps can slightly reduce overall transcription accuracy.

Top AI & Tech News

  • World Labs launched Atlas, a multimodal AI system that reconstructs 3D worlds from minimal visual input and generates image or video frames with precise camera control

  • Bernie Sanders urged AI labs worldwide to pause advanced AI development, warning the technology could be beyond its creators’ control

  • Dyson has launched the $499 CameraJet AI toothbrush, which uses an onboard camera and AI to identify gaps between teeth and spray mouthrinse while brushing

  • Google’s latest Android updates use AI through Gemini to reduce motion sickness, assist blind and low-vision users, remember item locations, enhance collaboration, and personalize messages

AI Art Spotlight

Create Your Own Photo Like This Using the Prompt Below:

Ultra-realistic studio portrait of a man, close-up headshot, centered composition, neutral expression, sharp facial details, textured skin, clean grooming, wearing a black turtleneck and dark tailored coat, modern minimalist fashion, monochrome black and white photography style, only the glasses in color (Translucent amber-orange frame and lenses
), high contrast lighting, soft studio light, cinematic shadows, editorial fashion photography, plain light background, 85mm lens, shallow depth of field, ultra detailed, photorealistic, magazine quality, 8K.

Model: Nano Banana 2

Resource of the Day

Cache Engineering: Cut AI Costs 10x

Learn how cache engineering can dramatically reduce the cost of running AI agents and long-context workflows. This guide uses Kimi K3 to explain how prompt caching works, why stable prefixes can make repeated input tokens up to 10x cheaper, and how to structure system prompts, tools, conversation history, RAG content, and agent loops for higher cache hit rates.

Featured AI Video

How to Use Claude Code for F-R-E-E in 2026

Want Weekly Growth Playbooks to Scale Smarter?

Want to find growth trends early? Join weekly playbooks to improve ads, content, tools, and growth decisions with practical steps.

Unlock $10,000+ Worth of F-R-E-E Growth Blueprints, including: 👇

  • Paid ads playbook

  • Content strategy checklist

  • AI workflow systems

  • Startup case studies

  • Growth tools library & more