Sunday, March 29, 2026 Live Intelligence Atlanta, GA  ·  jasonpollakmarketing.com
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The JPM AI Marketing Dispatch Jason Pollak Marketing  ·  Weekly Intelligence
Sunday, March 29, 2026 AI · Paid Media · Brand Strategy · Search · Commerce Weekly Edition
🧠 Anthropic Mythos leak — most capable model yet  ·  🏁 OpenAI Spud pre-training complete  ·  🛒 Shopify agentic storefronts live in ChatGPT  ·  💻 Claude Computer Use now on macOS  ·  📉 ChatGPT shopping CTR: 0.91% — 7x below benchmark  ·  🔍 GEO adoption hits 55% of marketers  ·  💰 Anthropic drops long-context pricing surcharge  ·  📧 Yahoo Scout: sponsored events land in Gmail  ·  🧠 Anthropic Mythos leak — most capable model yet  ·  🏁 OpenAI Spud pre-training complete  ·  🛒 Shopify agentic storefronts live in ChatGPT  ·  💻 Claude Computer Use now on macOS  ·  📉 ChatGPT shopping CTR: 0.91% — 7x below benchmark  ·  🔍 GEO adoption hits 55% of marketers  ·  💰 Anthropic drops long-context pricing surcharge  ·  📧 Yahoo Scout: sponsored events land in Gmail  · 
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Top Story
Lead
Anthropic's Mythos Leaks: The Model Race Has a New Leader
AI Models · Sunday, March 29 · JPM Desk
Internal benchmarks for Anthropic's unreleased Mythos/Capybara model surfaced this week. The numbers are rewriting the competitive map.
The leaked data positions Mythos as Anthropic's most capable model to date, outperforming current flagship benchmarks across reasoning, code, and long-context tasks. The timing is deliberate: Anthropic is in IPO positioning mode, and a leaked capability ceiling is as good as a press release.
For marketers, this matters beyond the model specs. The Mythos leak lands alongside Claude Computer Use going live on macOS and Anthropic eliminating the long-context pricing surcharge, making the 1M token context window standard pricing. Anthropic is stacking capability, automation, and cost signals simultaneously.
Read Full Story · Fortune
1M Token context window now at standard pricing, long-context surcharge eliminated · Anthropic
That pricing move is underrated. The previous surcharge made extended-context use cases a premium decision. Removing it opens the door for agencies and operators to build against large documents, full campaign histories, and deep research tasks without the cost math working against them.

"Capability leak. Automation launch. Price drop. Anthropic is making three moves at once."

Also This Week
Claude Computer Use Launches on macOS
Anthropic's automation play is live. Claude can now operate desktop applications, navigate interfaces, and execute multi-step tasks on Mac. The practical ceiling for no-code automation just moved significantly higher for anyone already in the Claude ecosystem.
Read More · VentureBeat
Anthropic Removes Long-Context Pricing Surcharge
1M token context is now standard pricing with no premium. Developer-friendly positioning ahead of what looks like a big capability push. The combination of Mythos specs and this pricing move signals Anthropic is competing hard on both performance and accessibility.
Read More · Byteiota
Model Race
Competitor Watch
OpenAI's Spud Completes Pre-Training as Sora Is Officially Shut Down
AI Models · OpenAI
OpenAI confirmed pre-training is complete on Spud, its next frontier model. Sam Altman's framing: this model won't just assist work, it will accelerate the economy. The positioning is shifting from tool to infrastructure.
Meanwhile, Sora is officially shut down. The open question now is whether its video capabilities get quietly folded into ChatGPT or another product down the line. If you built workflows around Sora, it's time to find a replacement.
Read Full Story · The Decoder

"Two frontier models in the same week. The gap between labs and everyone else keeps widening."

Anthropic Updates
Claude Computer Use Launches on macOS
Anthropic's automation play is live. Claude can now operate desktop applications, navigate interfaces, and execute multi-step tasks on Mac. The practical ceiling for no-code automation just moved significantly higher for anyone already in the Claude ecosystem.
Read More · 9to5Mac
Long-Context Surcharge Eliminated + Faster Rate Limits at Peak
1M token context is now standard pricing with no premium. Anthropic also announced faster rate limits during peak hours, a direct response to developer complaints about throughput. Both moves signal Anthropic is competing hard on accessibility, not just capability.
Read More · The Register
Commerce
Live Now
Shopify Agentic Storefronts Go Live Inside ChatGPT
5.6 million Shopify merchants can now be discovered, browsed, and purchased through ChatGPT conversations. Commerce has entered the AI chat interface and product discovery is being rewired in real time.
Read More · Shopify
Platforms
Expanding
Google & YouTube: Gemini Now Selects Your Influencers
Gemini is being embedded into YouTube's creator marketplace to automate influencer matching, analyzing audience fit, brand alignment, and performance signals without a human in the loop. Another manual layer of campaign management that just went autonomous.
Read More · AdWeek
Leading Edge
New Surface
Yahoo Scout Puts Sponsored Events Inside Gmail
Email · Advertising · Yahoo
Yahoo's Scout feature is embedding sponsored event suggestions directly into Gmail, triggered by email context like travel bookings, ticket confirmations, and calendar activity. It's advertising that reads your inbox to find the moment.
This is email-native advertising at a new depth. The inventory is new, the targeting mechanism is behavioral and contextual, and the interface is a conversation thread. Early movers in event-adjacent categories have a real window before it scales.
Read Full Story · AdWeek

"The inbox is becoming an ad surface. Yahoo just opened the door."

Adoption Trends
GEO Watch
GEO Adoption Reaches 55% of Marketers
More than half of marketers are now actively optimizing for generative engine results. LinkedIn citations inside AI systems are doubling, meaning B2B content is increasingly being surfaced as a source, not just a destination. If your content isn't being extracted, it's invisible.
Read More · Foundation Inc
Tools
New
Picsart Launches AI Agent Marketplace
Picsart opened a marketplace for AI creative agents, purpose-built tools for image generation, editing, and brand asset production. Another signal that creative production is fragmenting into composable, task-specific agents rather than monolithic platforms.
Read More · TechCrunch
Industry Shift
Structural
OpenAI Renames Safety Org: AGI Deployment Is the New Frame
OpenAI · Strategy
OpenAI restructured its safety team under a new name: AGI Deployment. The language shift is meaningful, moving from "safety" as guardrails to "deployment" as the organizing principle. The narrative has shifted from "can we do this responsibly" to "how do we ship this at scale."
For marketers and operators: this signals OpenAI's internal center of gravity is now on velocity, not caution. Expect faster capability releases and less runway between announcement and availability.
Read Full Story · Trending Topics
Performance Reality
Disappointing
ChatGPT Shopping CTR: 0.91%, Nearly 7x Below Benchmark
ChatGPT's first real shopping performance data is in, and it's rough. A 0.91% click-through rate against an industry benchmark closer to 6% tells you the intent-to-commerce conversion isn't there yet, even as Shopify's agentic integration launches on the same platform.
The contrast is sharp: Shopify builds the pipe, ChatGPT can't yet fill it. Watch this gap over Q2 before committing budget to conversational commerce.
Read More · CNBC
Watch This Week
Watch
Mythos/Capybara official announcement. Anthropic will confirm or exceed leaked benchmarks. Position your stack before the launch pricing window closes.
Test
Claude Computer Use on macOS. Map your highest-friction manual workflows and run a pilot this week. Early operators will build the playbook everyone else copies.
Audit
Shopify product data for ChatGPT discoverability. Title clarity, structured attributes, and category specificity matter more now that browsing is conversational.
Track
LinkedIn citation rates in AI systems. If B2B is your lane, your content structure needs to be extraction-ready, not just well-written.
Replace
Sora is shut down. Find a video generation alternative now. Watch for whether OpenAI integrates those capabilities into ChatGPT or another product before rebuilding your workflow.
Further Reading
GEO: How to Optimize for AI Search Engines
The framework for getting your content extracted, cited, and surfaced in AI-generated answers, not just ranked in traditional results.
Read on Search Engine Land
MCP for Marketers — Full Series
How Model Context Protocol is changing marketing workflows: Gmail, Calendar, Notion, Google Drive, and more, all connected to Claude.
Read the Series
More from Jason Pollak Marketing
Full-funnel strategy, AI workflows, local SEO, paid media. All on the JPM blog.
Visit the JPM Blog
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