#216 - Grok 4, Project Rainier, Kimi K2 from Last Week in AI

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#216 - Grok 4, Project Rainier, Kimi K2

1 hour 42 minutes Posted Jul 14, 2025 at 2:00 pm.

) Intro / Banter

) News Preview

) Elon Musk's xAI launches Grok 4 alongside a $300 monthly subscription | TechCrunch

) Elon Musk’s AI chatbot is suddenly posting antisemitic tropes

) Perplexity launches Comet, an AI-powered web browser | TechCrunch

) OpenAI is reportedly releasing an AI browser in the coming weeks | TechCrunch

) Replit Launches New Feature for its Agent, CEO Calls it ‘Deep Research for Coding’

) Cursor launches a web app to manage AI coding agents

) Cursor apologizes for unclear pricing changes that upset users | TechCrunch

) Lovable on track to raise $150M at $2B valuation

) Amazon built a massive AI supercluster for Anthropic called Project Rainier – here's what we know so far

) 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 GPUs and up to 2 Gigawatts of power under one roof, equivalent to powering 1.9 million homes

) Microsoft's own AI chip delayed six months in major setback — in-house chip now reportedly expected in 2026, but won't hold a candle to Nvidia Blackwell

) Ilya Sutskever becomes CEO of Safe Superintelligence after Meta poached Daniel Gross

) OpenAI’s Stock Compensation Reflect Steep Costs of Talent Wars

) Hugging Face Releases SmolLM3: A 3B Long-Context, Multilingual Reasoning Model MarkTechPost

) Kimi K2: Open Agentic Intelligence

) Kyutai Releases 2B Parameter Streaming Text-to-Speech TTS with 220ms Latency and 2.5M Hours of Training

) Does Math Reasoning Improve General LLM Capabilities? Understanding Transferability of LLM Reasoning

) Measuring the Impact of Early-2025 AI on Experienced Open-Source Developer Productivity

) Mitigating Goal Misgeneralization with Minimax Regret

) Correlated Errors in Large Language Models

) What skills does SWE-bench Verified evaluate?

) Evaluating Frontier Models for Stealth and Situational Awareness

) When Chain of Thought is Necessary, Language Models Struggle to Evade Monitors

) Why Do Some Language Models Fake Alignment While Others Don't?

) Positive review only': Researchers hide AI prompts in papers

) Google faces EU antitrust complaint over AI Overviews

) The transfer of user data by DeepSeek to China is unlawful': Germany calls for Google and Apple to remove the AI app from their stores

) Virology Capabilities Test (VCT): A Multimodal Virology Q&A Benchmark

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Show notes

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 [email protected] and/or [email protected]

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

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