AI NEWS - Something Big is Happening: Gemini 3.1 Pro, GPT-5.3-Spark, and Anthropic $30B fundraise

It's time for another AI News roundup with Shane and Abhi! This week was absolutely massive. Matt Shumer's viral article about AI automation, which describes his own job being automated in real time, has reached 84 million views. Anthropic raised $30 billion at a $380B valuation (one of the largest private raises in tech history). Claude Sonnet 4.6 launched with a 1M token context window. And the Chinese model tsunami is real: Qwen 3.5, GLM 5.0, MiniMax M2.5 (nearly Opus-level at 1/8 the cost), and DeepSeek v4 rumors.

We also cover Google's Gemini 3.1 Pro, WebMCP native browser support in Chrome 146, OpenAI's agent workflow tips, Peter Steinberger joining OpenAI, Lyria 3 music generation, Kimi Claw integration, and the explosion of agent platforms (Oz, Browserbase Functions, and a former GitHub CEO raising $60M for "version control for agents").

Plus: Real production stats from Ramp (57% of merged PRs from background agents), Letta's context repositories, and why Mastra's Observational Memory is becoming the reference implementation for agent memory.

🧰 RESOURCES MENTIONED

Matt Shumer's article: https://x.com/mattshumer_/status/2021256989876109403
Anthropic $30B raise: https://x.com/anthropicai/status/2022023155423002867
Claude Sonnet 4.6: https://x.com/claudeai/status/2023817132581208353
OpenAI agent tips: https://x.com/openaidevs/status/2021725246244671606
Gemini 3.1 Pro: https://x.com/OfficialLoganK/status/2024516665740833156
WebMCP in Chrome 146: https://x.com/chromiumdev/status/2022363079976034455
Ramp production stats: https://x.com/rahulgs/status/2020984194038628832

AI Agents Hour is a weekly livestream hosted by Mastra CPO Shane Thomas and CTO Abhi Aiyer. Airing Mondays at 12PM Pacific on YouTube and X, the show covers breaking AI news, agent development techniques, and features interviews with industry experts building AI applications today.

📚 MASTRA RESOURCES
Mastra: https://mastra.ai
Learn Mastra in the world's first MCP-Based Course: https://mastra.ai/course
Principles of Building AI Agents (Book): https://mastra.ai/book
Patterns for Building AI Agents (New Book): https://mastra.ai/blog/patterns-book https://docs.google.com/forms/d/e/1FAIpQLSduJjc515f6RZJqtkR2ByqJZrB0iP8B7SUKnjjZE9IajH_I8w/viewform

MASTRA?
Mastra is an open-source TypeScript framework designed for building and shipping AI-powered applications and agents with minimal friction. It supports the full lifecycle of agent development—from prototype to production. You can integrate it with frontend and backend stacks (e.g., React, Next.js, Node) or run agents as standalone services. If you’re a JavaScript or TypeScript developer looking to build an agentic or AI-powered product without starting from first principles, Mastra provides the scaffolding, tools, and integrations to accelerate that process.

CHAPTERS
00:00 – Intro
00:17 – Something Big Is Happening
02:34 – Anthropic's $30B Funding Round
03:14 – Claude Sonnet 4.6 Release
04:19 – GPT-5.3-Spark
06:42 – OpenAI's Tips for Long-Running Agent Workflows
07:20 – Peter Steinberger (OpenClaw) Joins OpenAI 
09:06 – Google Gemini 3.1 Pro Launch
10:21 – WebMCP in Chrome 146: Native Agent Support
12:39 – Lyria 3: AI Music Generation
14:00 – Qwen 3.5
14:16 – GLM 5.0 & MiniMax M2.5 Released
15:48 – DeepSeek v4 Rumors: 10-40x Lower Inference Costs
16:15 – Kimi Claw
17:01 – Oz: Orchestrate Agents in the Cloud
17:10 – Browserbase Functions: Lambda with a Browser
17:41 – Intent
17:41 – Former GitHub CEO's $60M seed round
20:11 – Lab
20:43 – Ramp's 57% PR Stat
20:52 – Letta Context Repositories & Memory Subagents
21:10 – More Observational Memory
22:20 – Markdown from any website
22:34 – Tavily joins Nebius
22:53 – Ghost, the first database designed for agents
23:21 – Outro