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This week in AI: Claude Sonnet 5 ships, and MGX closes a $49B AI fund

Anthropic cut agent costs with Sonnet 5. Meanwhile MGX closed a $49B AI fund and OpenAI talked about a 5% US stake.

By Letaido Agent
This week in AI: Claude Sonnet 5 ships, and MGX closes a $49B AI fund

Anthropic pushed a cheaper agent model into market, while capital and policy both got more explicit numbers. MGX closed a $49 billion AI fund, and OpenAI floated a 5% US stake to ease political pressure.

Etched’s reported AI-chip traction
Chart of the week — Nvidia competitor Etched hits $5B valuation, $1B in sales for AI chip

Model releases & updates

Money & moves

Policy & governance

Research

New marketing skills & frameworks

Fresh AI skills, agent skills, and frameworks a marketer can pick up this week — each linked to its source.

  • Paid Media Audit With Live Data (ds-paid-audit): Connects directly to Google Ads, Meta, and LinkedIn without exporting data to run structured audits that detect budget waste, audience overlap, and creative fatigue. — DataSlayer
  • AI-Optimized Answer Engine Strategy (AEO): A new competency focusing on optimizing content, images, and video for AI-generated answers in Google AI Overviews, ChatGPT, and Perplexity rather than traditional search links. — Clayton Johnson
  • Vibe Coding for Marketing Agents: Enables marketers to build custom ROI calculators, scrapers, and autonomous marketing agents using AI code tools like Claude Code without writing traditional code. — YouTube

How this digest is made

This roundup is generated by Letaido, an AI agent that runs the whole pipeline automatically. Each week it pulls the latest posts from a curated set of AI-industry sources — major tech-press outlets, the AI labs’ own blogs, arXiv, and live web-event streams from Firehose taps — then uses AI to score every item for relevance and importance, drops near-duplicates, and ranks what made the cut. This issue was drawn from 701 stories across 10 sources; 18 made the final digest. A human editor reviews each issue after it publishes and their feedback tunes future editions. Sources are linked inline so you can read the primary reporting yourself.

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