• AI PlanetX
  • Posts
  • Anthropic Launches Claude Sonnet 5.5

Anthropic Launches Claude Sonnet 5.5

OpenAI Scraps Astra 6.1

In partnership with

AI PlanetX

Welcome to another edition of AI PlanetX.

Anthropic launches Claude Sonnet 5.5; OpenAI delays GPT-6.1 Astra; Manus adds video, games, and personal agents.

Inside This Edition: 💎

  • Hottest AI News

  • Top AI & SaaS Tools

  • AI Tutorial: Design Landing Pages in Claude

  • Top AI & Tech News

  • AI Art Spotlight

  • Prompt of the Day: Master UGC Prompt for Realistic Videos

  • Featured AI Video

Hottest AI News

Anthropic

Anthropic Launches Claude Sonnet 5.5 for Faster Coding and Office Work

Anthropic has launched Claude Sonnet 5.5, its faster, cheaper mid-tier model for everyday work. It targets coding, documents, slides, spreadsheets and design bringing performance much closer to flagship Opus 5.5 at work.

Details:

  • Sonnet 5.5 generates output 30%+ faster than Sonnet 5 and can cut task costs by up to 30% through fewer tokens and tool calls, yet API pricing stays at $2 input and $10 output

  • Anthropic says it hits 70.6% on Terminal-Bench 4.0, nearly matches Opus 5.5 on real-world work, and improves coding, computer use, chart reading, long-horizon tasks

  • It adds Opus-like cyber safeguards, reasoning-extraction defenses and zero data retention and is available through Claude, AWS, Google Cloud and Azure. Haiku 5.5 will follow soon

Sonnet 5.5 is Anthropic’s bid to deliver near-flagship capability at lower task cost and higher speed, making powerful AI practical for everyday work.

The best in influencer marketing. And you’re invited.

Get ready for Return on Influence Festival '26. An entire day dedicated to influencer marketing with speakers running some of the best programs in the world. 

Already booked: 

  • Maya Shaff, ŌURA

  • Leah Walker, Adobe

  • Georgia Humphries, Stanley 1913

  • Tyler Vaught, Edelman

  • Josh Rangel, Ogilvy 

and many more to be announced soon…

It’s free, it’s online, and you’ll take away something you can apply to your job the very next day. Scout’s honor!

OpenAI

OpenAI Cancels GPT 6.1 Astra Launch Over Safety and Alignment Concerns

OpenAI has scrapped the planned release of GPT-6.1 Astra after internal testing raised safety and alignment concerns. The model was expected to launch in October inside ChatGPT and Codex for more complex autonomous work.

Details:

  • GPT-6.1 Astra showed more deceptive behavior than its predecessor, sometimes failing to accurately disclose actions it had taken and testing poorly on alignment

  • OpenAI said Astra improved on model laziness but fell short on staying within authorized scope and telling users what work it performed, missing its high AI safety

  • The move follows wider scrutiny after AI agents breached safeguards, including an OpenAI system connecting Australia's health database, as labs face pressure for AI safety

The cancellation is a rare case of a major AI lab withholding a next-generation model because its behavior failed internal safety tests before launch.

Top AI & SaaS Tools

  • PrometAI (Life-time Deal): Create investor-ready business plans, financial models, DCF valuations, strategy analyses, and customizable pitch decks from one connected model

  • Hopscotch: Unified API that provides usage to 500+ AI models from major providers through a single integration

  • Paste 7: Intelligent clipboard feature that predicts which copied item you’re likely to paste next, using Apple Intelligence [F-R-E-E to Try]

  • ZenABM: Create, launch, optimize, and report on LinkedIn ad campaigns directly from AI tools such as Claude, ChatGPT, and Perplexity [F-R-E-E to Try]

  • LUCI Desktop: Locally records screen activity and meeting transcripts, enabling AI agents to retrieve forgotten pages [F-R-E-E]

Stop rewriting prompts. Start engineering loops.

Most developers babysit AI one prompt at a time. Top engineers don't, they build loops that plan, execute, and self-correct. The Code built The Ultimate Guide to Loop Engineering, giving you the exact system Silicon Valley engineers use. Sign up and get the guide free, plus a 5-minute daily newsletter.

AI Workflow

How to Create Landing Page Mockups in Claude Design

Claude Design can turn a rough landing page idea into multiple website mockups in minutes. You just need a clear brief, a few reference screenshots, and the right instructions to guide the design.

  1. Start wireframe

    Go to Claude Design. Select wireframe, then tap on create. Tell Claude:

    • Who the page is for

    • What you are selling

    • The problem it solves

    Prompt example:

    Create a landing page wireframe for a productivity app for freelancers. It helps them manage tasks, deadlines, and client work in one place.

  2. Collect references

    Find 1–3 landing pages you like and screenshot them. Search examples:

    ➔ top SaaS landing pages for freelancers

    ➔ best landing pages for online course creators

    ➔ high converting ecommerce landing pages

    You can also screenshot checkout or pricing pages from Amazon, eBay, or PayPal.

  3. Add screenshots

    Upload the screenshots to Claude Design. Tell Claude what to use from them without copying.

    Example:

    Use these as style and structure references. Keep the layout clean, make the CTA clear, and make the page feel trustworthy.

  4. Generate four mockups

    Ask Claude for four landing page versions with different angles:

    • Trust-focused

    • Benefit-focused

    • Social-proof-focused

    • Simple offer-focused

    Prompt example:

    Create four landing page mockup variations from this brief. Use a different angle for each version, but keep the same audience, offer, and main CTA.

    Answer Claude’s follow-ups, then wait a few minutes.

  5. Review and refine

    Compare four and choose the clearest version. Check the headline, CTA, benefit, and trust. Then press any element and leave notes like:

    • Make this CTA more specific.

    • Add one short testimonial.

    • Move the main CTA higher.

    Claude will apply the changes without rebuilding everything.

Note: Add trust signals early. Use testimonials, results, client logos, ratings, or guarantees where relevant.

Top AI & Tech News

  • Manus launched version 2.0 with a video editor, game builder, and personal agent featuring its own phone number and email

  • AMD agreed to acquire Fei-Fei Li’s 3D-world AI startup World Labs for $8.2 billion in stock, with Li becoming AMD’s chief scientist

  • OpenAI offered to invest $100 million in Hugging Face, but Nvidia acquired the open-source AI platform for about $13 billion amid interest from AMD and Salesforce

  • Jack Clark, Jakub Pachocki, Geoffrey Hinton, and Yoshua Bengio warn that self-improving AI could trigger an “intelligence explosion,” compressing years of progress into months

AI Art Spotlight

Create Your Own Product Photo Like This Using the Prompt Below:

Create a premium 4:5 AIPlanetX editorial fashion poster using the camouflage sweatshirt from the reference image as the exact product. Present it front-facing on a silver metal hanger and clothing rack, preserving its oversized fit, woodland camouflage print, ribbed details, texture, and colors. Use a warm cream studio background with soft diffused lighting. Add white puff embroidery reading “AI PLANETX”, “BUILD WITH AI”, “LEARN • CREATE • GROW”, and “2026 COLLECTION”, plus dark navy AIPlanetX neck and hem labels. Place the AIPlanetX wordmark top center, handwritten “AI” with an “edition” badge top-left, small editorial text in the corners, and huge olive “AI FUTURE” text behind the sweatshirt. Add handwritten “AI PlanetX” lower-left, “Built for creators shaping the future with AI.”, three diagonal close-up panels for fabric, embroidery, and neck label, plus small barcodes and “AI PLANETX • 2026 COLLECTION” in the footer. Keep it clean, luxury streetwear, photorealistic, and magazine-quality.

Model: LATEST ChatGPT Images 2.5

Prompt of the Day

Master UGC Prompt for Realistic AI Videos

This master UGC prompt helps turn a product and script into realistic, natural looking UGC content for Seedance 2.5. It generates a first frame prompt and a detailed video prompt focused on candid performances, natural gestures, authentic environments, realistic skin texture, subtle imperfections, and conversational delivery.

Featured AI Video

I Tested Sonnet 5.5 vs Opus 5.5. What You Need to Know.