#216 - Grok 4, Project Rainier, Kimi K2

Our 216th episode with a summary and discussion of last week's big AI news!
Recorded on 07/11/2025

Hosted by Andrey Kurenkov and Jeremie Harris.
Feel free to email us your questions and feedback at contact@lastweekinai.com and/or hello@gladstone.ai

Read out our text newsletter and comment on the podcast at https://lastweekin.ai/.

In this episode:

• xAI launches Grok 4 with breakthrough performance across benchmarks, becoming the first true frontier model outside established labs, alongside a $300/month subscription tier
• Grok's alignment challenges emerge with antisemitic responses, highlighting the difficulty of steering models toward "truth-seeking" without harmful biases
• Perplexity and OpenAI launch AI-powered browsers to compete with Google Chrome, signaling a major shift in how users interact with AI systems
• Meta study reveals AI tools actually slow down experienced developers by 20% on complex tasks, contradicting expectations and anecdotal reports of productivity gains

Timestamps + Links:

• (00:00:10) Intro / Banter
• (00:01:02) News Preview

      Tools & Apps

• (00:01:59) Elon Musk's xAI launches Grok 4 alongside a $300 monthly subscription | TechCrunch
• (00:15:28) Elon Musk’s AI chatbot is suddenly posting antisemitic tropes
• (00:29:52) Perplexity launches Comet, an AI-powered web browser | TechCrunch
• (00:32:54) OpenAI is reportedly releasing an AI browser in the coming weeks | TechCrunch
• (00:33:27) Replit Launches New Feature for its Agent, CEO Calls it ‘Deep Research for Coding’
• (00:34:40) Cursor launches a web app to manage AI coding agents
• (00:36:07) Cursor apologizes for unclear pricing changes that upset users | TechCrunch

      Applications & Business

• (00:39:10) Lovable on track to raise $150M at $2B valuation
• (00:41:11) Amazon built a massive AI supercluster for Anthropic called Project Rainier – here's what we know so far
• (00:46:35) Elon Musk confirms xAI is buying an overseas power plant and shipping the whole thing to the U.S. to power its new data center — 1 million AI