Big week. OpenAI had a security incident, where a model reportedly broke out of its evaluation parameters and hacked Hugging Face — and the guardrails on OpenAI's and Anthropic's own models blocked responders from investigating, so they had to fall back to an open model to get to the bottom of it.

Opus 5 lands close to Fable at 26% lower cost and tops the front-end arena, but the reviews are mixed, and the token usage is brutal — one chart clocks it at 97 million tokens on a task GPT 5.6 did in 4.3 million. Then the fight everyone's watching: NVIDIA, OpenAI, and a hundred others sign an open-models letter, Anthropic declines and calls for mandatory safety testing, and the room asks the obvious question — who gets to write the test? Plus MCP goes fully stateless (it's basically a REST API now), Kimi K3 weights drop with a K3.1 leak, SSI partners with NVIDIA, Stripe eyes OpenRouter for $10B, Cognition buys Poke, and DoorDash announces drone delivery — so your agent really can order you pizza by helicopter.

AI Agents Hour is a weekly livestream by Mastra CPO Shane Thomas and CTO Abhi Aiyer. Mondays 12PM Pacific.

📚 READ MORE
Anthropic destroyed the books (Project Panama): https://x.com/HedgieMarkets/status/2081534588485296565
OpenAI security incident: https://x.com/sama/status/2079661132302995790
Claude Opus 5 launch: https://x.com/claudeai/status/2080699495453528290
Opus 5 tops the front-end arena: https://x.com/arena/status/2081831019377004727
Opus 5 intelligence & cost: https://x.com/ArtificialAnlys/status/2080734447717298483
Siqi Chen walks it back: https://x.com/blader/status/2082275046937292859
Theo on Opus 5: https://x.com/theo/status/2081880182936502474
The token-usage chart: https://x.com/jpschroeder/status/2081751862768717956
Jensen's open-models letter: https://x.com/JensenHuang/status/2080643682408321103
Denny's stays open: https://x.com/dennysdiner/status/2081069889931112816
Anthropic declines to sign: https://x.com/anthropicai/status/2081864750296658008
MCP goes stateless: https://x.com/claudedevs/status/2082164248697069935
Kimi K3 weights are out: https://x.com/Kimi_Moonshot/status/2081760186235289764
Kimi K3.1 leak: https://x.com/Mr_Salio/status/2081345681734713635
SSI x NVIDIA: https://x.com/ssi/status/2081732119194394763
Stripe eyes OpenRouter: https://x.com/andrewcurran_/status/2080397684134007189
Notion as Code: https://x.com/notionhq/status/2080331924732850687
Cognition acquires Poke: https://x.com/cognition/status/2080311229256540194
ChatGPT Voice on desktop: https://x.com/openai/status/2080378182469857576
DoorDash Air: https://x.com/DoorDash/status/2082451101840740753

📚 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

WHAT IS 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 Cold open
00:27 Welcome
00:34 Anthropic destroyed the books ("Operation Panama")
02:32 The OpenAI security incident: a model hacked Hugging Face
04:35 Opus 5 launches — is it better than Fable?
05:46 The mixed reviews
07:05 Opus 5 is token-hungry
08:17 The open-models letter: who writes the safety test?
10:03 Anthropic declines to sign
13:35 The 1,200-employee "pacing" statement
15:28 Trump's China AI advisors
15:48 Be a guest on the show
16:03 MCP is not dead, it's just stateless now
22:24 Quick hits: Kimi K3 weights & the K3.1 leak
23:11 SSI + NVIDIA
23:43 Stripe eyes OpenRouter for $10B
24:24 Notion as Code
25:28 Cognition acquires Poke
25:59 ChatGPT voice & the beach test
27:14 DoorDash Air: pizza by drone
28:10 Outro