Last Week in AI #221 - OpenAI Codex, Gemini in Chrome, K2-Think, SB 53
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Oct 7, 2025 
Join Michelle Lee, the founder and CEO of Medra, as she dives into the latest AI developments. Discover how OpenAI's Codex is revolutionizing coding with GPT-5 integration. Explore new advancements in robotics, including Figure AI’s massive funding and Unitree’s IPO plans. The duo delves into Google's Gemini in Chrome, enhancing our browsing experience, and discusses the implications of recent legal battles impacting AI, including lawsuits from Warner Bros. and Rolling Stone. Get ready for a thrilling ride through the fast-paced world of AI!
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Replit Grows Rapidly With AI Coding
- Replit reached a $3B valuation after rapid ARR growth to $150M driven by AI coding adoption.
- Lower barriers for non-professionals accelerated Replit's revenue and market expansion.
Perplexity Scales With Big Funding
- Perplexity raised $200M at a $20B valuation while expanding into browsers and agents.
- The funding reflects investor appetite for AI-native search and agent platforms.
K2Think Packs Reasoning Into Fewer Parameters
- K2Think shows parameter-efficient reasoning by fine-tuning QUANT 2.5 with reasoning training tricks.
- The 32B model outperforms larger peers on some reasoning benchmarks via training and inference tweaks.