Fable is gone, and the race to replace it is already on. Shane and Abhi open with the fallout — reports that Mythos breached classified NSA systems, the ID-verification future that may follow, and David Sacks' "you asked for it" take.
Then the story flips: OpenAI's GPT-5.5 Cyber lands state-of-the-art on Cyber Gym, beating Fable and Mythos on the underlying benchmarks, with OpenAI Daybreak shipping alongside it. GPT-5.6 leaks, then slips to mid-July. GLM 5.2 arrives near Opus 4.8, tops Design Arena, and runs on a Mac. Cursor goes after GitHub with Origin, adds mobile and its own frontier model on Colossus after the SpaceX deal closes. Vercel ships Eve, Fred Schott counters with Flue, Claude lands in Slack, and Midjourney — yes, the image company — unveils a full-body medical scanner headed for spas.
AI Agents Hour is a weekly livestream by Mastra CPO Shane Thomas and CTO Abhi Aiyer. Mondays 12PM Pacific.
📚 READ MORE
The Fable story, Mythos & the NSA: https://x.com/kimmonismus/status/2068605229965234238
GPT-5.5 Cyber beats Fable (Sam Altman): https://x.com/sama/status/2069121360744550796
OpenAI Daybreak: https://x.com/OpenAI/status/2069104283824640023
GPT-5.6 leak (Mark K): https://x.com/mark_k/status/2069169916432003105
GPT-5.6 delayed: https://x.com/synthwavedd/status/2069432791184650426
GLM 5.2 (Z.ai): https://x.com/zai_org/status/2066938937344495629
GLM 5.2 tops Design Arena: https://x.com/Designarena/status/2066940737011560652
GLM 5.2 vs Opus (Cline): https://x.com/cline/status/2069171146994729078
1-bit GLM 5.2 runs local (Unsloth): https://x.com/UnslothAI/status/2069418532375564484
Cursor Origin: https://x.com/cursor_ai/status/2069149296436330776
Cursor Compile keynote: https://x.com/cursor_ai/status/2067012220832329782
Swyx on Origin: https://x.com/swyx/status/2066928345246470204
Vercel Eve: https://x.com/vercel/status/2067180054979936413
Flue 1.0 (Fred Schott): https://x.com/FredKSchott/status/2066962296119959581
Codex record-replay to skills: https://x.com/OpenAIDevs/status/2067681320281723113
Claude Tag in Slack: https://x.com/claudeai/status/2069468693017268244
Replit in Slack: https://x.com/Replit/status/2067661213278900402
Midjourney Medical: https://x.com/midjourney/status/2067421950314688759
Sakana Fugu: https://x.com/SakanaAILabs/status/2068861630327443966
📚 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
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
00:30 Welcome
01:02 Fable fallout: did Mythos breach the NSA?
03:10 GPT-5.5 Cyber beats Fable & OpenAI Daybreak
05:23 GPT-5.6 delayed, Gemini 3.5 Pro slips
05:52 GLM 5.2: near-Opus, and it runs on a Mac
09:52 Subscribe break
09:55 Cursor's Origin takes on GitHub
11:12 Cursor mobile, frontier model & the SpaceX deal
11:52 Vercel's Eve, Flue & Codex skills
13:48 Claude Tag & Replit in Slack
14:57 Midjourney goes medical: full-body scanners
16:42 Sakana Fugu & the rise of model routing
19:37 Outro
