How Grok‑4’s leap and an AI‑powered browser land‐grab just rewrote next‑quarter marketing playbooks Here’s a new episode of The Reddy Rundown, crafted so you don’t have to frantically follow every headline wondering what you’re missing as an exec in 2025 trying to keep up.  I’m Shawn Reddy—founder, systems‑first marketer, and unapologetic tool‑tester. Below is what actually matters for revenue teams this week and the marketing systems shake‑ups hiding between the lines. 1. Grok‑4 cracks the “Humanity’s Last Exam” xAI’s fourth‑gen model posted 25.4 % on HLE—edging past Gemini and GPT‑4o—and 15.9 % on ARC‑AGI‑2, nearly double the second‑best score. Why marketers should care: Normal Grok‑4 outruns peers without tools : Faster, cheaper zero‑shot copy ideation, but limited distribution integrations. Grok‑4 Heavy (multi‑agent) lands 44 % with tools : Viable for “continuous campaign simulators” that auto‑test hooks, variations, and CTAs overnight—if you can stomach the $300/seat pricing. API pricing on par with Sonnet 4 but 5× pricier to run benchmark‑scale jobs : Budget Grok for strategy sprints, not day‑to‑day A/B copy tweaks. My take: xAI isn’t winning share of marketers’ keyboards yet, but its tools‑native architecture will pressure OpenAI and Anthropic to expose deeper analytics hooks. Watch for X Ads bundling Grok prompts before year‑end. 2. Browser land‑grab: Comet ships, OpenAI circles • Perplexity’s “Comet” browser is live for Max subscribers, replacing search results with an answer‑engine and a sidebar agent that can book restaurants, fire off LinkedIn invites, or unsubscribe you from newsletters. • OpenAI’s own browser is reportedly weeks away, integrating chat natively and hoovering user‑behavior data for model training. Marketing fallout 1. Attribution shake‑up 2.0 – If the browser becomes the funnel, last‑click logic dies (again). Schema‑rich content and first‑party pixels matter more than channel ROAS spreadsheets. 2. Agent‑driven shopping – Comet already auto‑fills carts. Expect CPCs on bottom‑funnel keywords to rise as agents negotiate. 3. SEO ≈ UX – When the interface is a summary, your “snackable insight per scroll” ratio becomes ranking factor #1. Action: audit your top‑20 pages against a “browser agent–ready” checklist—structured data, instant answers, and friction‑free checkout APIs. 3. Claude goes curriculum‑mode Anthropic rolled out MCP courses, a Code‑with‑Claude hands‑on event, and a Claude Code SDK to hard‑wire model context into developer workflows. Why it matters: Marketing ops teams can now embed Claude logic directly into CI/CD pipelines—think automated landing‑page QA or real‑time legal copy compliance. Less “prompt roulette,” more reproducible governance. 4. Infrastructure money moves • LangChain is raising $100 M at a >$1 B valuation. Investors are betting on workflow glue, even as many dev‑teams quietly roll their own agent stacks. • v0 launches an SDK—API calls turn design mock‑ups into production code. Perfect for spinning microsites tied to limited‑time offers without overloading engineering. • Restive Ventures is hunting fintech‑AI startups with $500 K+ tickets; if your product sits at the marketing‑data‑meets‑finance edge, the door’s open. Field Notes: Tools I’m stress‑testing (and the marketing play I see) Chronicle: (AI‑first slide builder) - Turn live webinar chats into a keynote deck while you’re still on‑air. Infinite Chat: (Long‑term memory layer for any model) - Feed it customer‑journey transcripts; let your chatbot recall intent shifts across months. Rendable3D: (Text‑to‑3D assets) - Spin product‑render reels for TikTok ads without a Blender wizard. Blok: (Simulated user‑agents voting on features) - A/B test copy variants before you run the real A/B on Meta. Billy: (Drag‑and‑drop bill splitter) - Decent lead magnet for hospitality clients—gate behind a receipt‑matching quiz. Comet browser: (Agentic browsing) - Content marketers: generate first‑draft competitive analysis by letting Comet “shop” three rival funnels and summarize friction points. Dia skills: (Shared prompt packs) - Bundle brand voice + campaign objectives; hand to freelancers to keep everything on‑rails. What I’m reading this weekend • The architecture behind Lovable & Bolt—system design lessons for growth loops. • Crash‑course on tightening RAG pipelines (replace hand‑wavy “use embeddings” advice with latency math). • “AI makes wishes real”—cautionary tales in misaligned KPIs (a must‑share with product). Closing loops That’s the download. If you’re integrating any of these tools into your revenue engine—or need a teardown of your current stack—hit reply. We’ve got a couple of consulting slots open before Q4 planning kicks off. Looking for a community of like-minded individuals who are interested in AI and Entrepreneurship? Join our free community here to get started: The AI Advantage Community  Thank you for reading! -Shawn