Anthropic lived rent-free in everyone's feed this week. Claude Sonnet 5 launched as "the most agentic Sonnet yet" — and within 24 hours, the government lifted the export controls on Fable 5 and Mythos 5. Shane and Abhi unpack both, plus the catch: Fable came back wrapped in new classifiers that quietly fall it back to Opus for coding, and it's coming off subscription plans on July 7.
That kicks off the routing wars — Devin Fusion, sidekick, mid-session routing — and a real question: if you're already using Fable to plan and something cheaper to code, you're the router. Then a stacked week of open and Chinese models (ZCode for GLM-5.2, DeepSeek V4's peak-hour pricing, Tencent's Hunyuan HY3), new inference silicon from Etched and Cerebras, an agent-memory result showing 5x more solved tasks, and the sleeper hot take: Palantir's "AI Sovereignty" manifesto and its shot at tokenmaxxing. Plus agentcn's Mastra recipes, Anthropic's own chip talks, and Anthropic's new "global workspace" research.
AI Agents Hour is a weekly livestream by Mastra CPO Shane Thomas and CTO Abhi Aiyer. Mondays 12PM Pacific.
📚 READ MORE
Claude Sonnet 5: https://x.com/claudeai/status/2072017450611142835
"Opus 4.8 is cheaper and better": https://x.com/Angaisb_/status/2072017407653060848
Export controls lifted: https://x.com/anthropicai/status/2072106151890809341
Fable back, with new classifiers: https://x.com/anthropicai/status/2072163884430229756
Fable off subscriptions July 7: https://x.com/trq212/status/2072814903170408784
Devin Fusion: https://x.com/cognition/status/2071624568465490170
Sidekick & mid-session routing: https://x.com/walden_yan/status/2071627241818399181
ZCode for GLM-5.2: https://x.com/zai_org/status/2072349453361557898
DeepSeek V4 & peak pricing: https://x.com/teortaxesTex/status/2071537369631625608
Tencent Hunyuan HY3: https://x.com/TencentHunyuan/status/2074148098876768478
Etched out of stealth: https://x.com/Etched/status/2071972062202343590
Gemma 4 31B on Cerebras: https://x.com/cerebras/status/2071776102633410684
Observational memory, 5x solves: https://x.com/hampsonw/status/2071728496909643917
Understand the code (Geoffrey Litt): https://x.com/geoffreylitt/status/2072522251300409556
Palantir's AI Sovereignty: https://x.com/PalantirTech/status/2072114267776491695
Primeagen's co-sign: https://x.com/ThePrimeagen/status/2072679880626512256
agentcn Mastra recipes: https://x.com/alaymanguy/status/2073500711737008270
Anthropic's chip talks: https://x.com/kimmonismus/status/2072685149708300360
Supermemory local: https://x.com/supermemory/status/2072086481997537301
Vercel + Shopify rebuild Hydrogen: https://x.com/vercel/status/2072041488012439803
"Th..thanks Dario": https://x.com/aljosa/status/2072175046324277644
📚 MASTRA RESOURCES
Mastra: https://mastra.ai
Mastra on X: https://x.com/mastra_ai
Mastra Discord: https://mastra.ai/community/discord
Mastra GitHub: https://github.com/mastra-ai
Learn Mastra: https://mastra.ai/learn
Principles of Building AI Agents (Book): https://mastra.ai/books/principles-of-building-ai-agents
Patterns for Building AI Agents (New Book): https://mastra.ai/books/patterns-of-building-ai-agents
⏱️ CHAPTERS
00:00 Cold open
00:29 Welcome
01:08 Claude Sonnet 5 — and the Opus 4.8 counter
04:04 Fable's export controls lifted (and the coding catch)
05:51 Daily-driving Fable & the July 7 subscription cliff
08:07 The routing wars: Devin Fusion & mid-session routing
09:45 OSS & China: ZCode, DeepSeek V4, Hunyuan HY3
11:57 Inference hardware: Etched & Cerebras
12:58 Agent memory: 5x more solves
14:40 You still have to understand the code
16:18 Tokenmaxxing & Palantir's AI Sovereignty
20:57 agentcn's Mastra recipes & Anthropic's chip talks
21:40 Supermemory local & Vercel/Shopify Hydrogen
22:11 The "Thanks Dario" meme
22:29 Anthropic's "global workspace" research
23:57 Outro
