Claude Mythos Is Coming: How to Prepare Before Everyone Else
A 27-minute briefing on Anthropic's unreleased frontier model and the five-step preparation playbook for using it before your competitors do.
June 7thA 22-minute breakdown of Anthropic's Mythos-class Fable 5 model — live demos, a structural argument about building blocks, and a pricing window closing June 22.
Claude Fable 5 is capable enough that the human bottleneck is no longer intelligence but account setup and payment authorization — making reusable, agent-accessible building blocks the real competitive moat going forward.
Claude Fable 5 is Anthropic's first Mythos-class public model — above Opus, notably stronger at tool use, spatial reasoning, and following visual examples. Three live demos make the capability case: a Lovable clone built in two prompts, a 23-page McKinsey-style research deck generated from a single PDF upload, and a persistent computer-use agent texted over iMessage. The more durable argument is structural: agents are good enough now that the remaining bottleneck is account setup and payment authorization. Agentic payments will remove that bottleneck, making well-documented, agent-accessible building blocks the infrastructure moat of the next economy. Use Fable 5 now while it is still included in Max and Pro plans; after June 22 it shifts to API pricing at twice the cost of Opus.
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Announces Fable 5 as a Mythos-class model released June 9, 2026. Explains model hierarchy (Haiku/Sonnet/Opus to Mythos/Fable). Context: 3.5 Sonnet birthed vibe coding in 2024; this is a new tier entirely.

Side-by-side live demo: Rylable vs actual Lovable both build a Notion dark-mode notes app. His version produces inline tables and editable headers; Lovable does not.

Shows the full 8-prompt chat thread, demos Minecraft game built via voice, explains Daytona + Convex as the core building blocks, announces open-source release.

Uploads a McKinsey PDF, prompts Fable 5 to make a matching AI outlook for H2 2026. Result: 23-page Meridian Global Institute deck with matching chart styles in one shot.

Tip: ask Claude to find and download 20 high-quality comparable reports, drag them in as style references. Demos max-effort mode and saving the result as a reusable chart-report skill.

Shows Chorus.com agent platform — texts a computer-use agent over iMessage, switches to Fable 5 via /model, gets a native Swift iOS app built and delivered to his home screen.

Community showcase: Pat Simmons's Age-of-Empires-quality RTS, a city block simulator with multi-agent traffic and night/day switching.

Frontier LLM research silently auto-throttles to Opus 4.8 via prompt modification and steering vectors. Security/hacking also restricted. Anthropic staff have unrestricted Mythos internally.

Core thesis via Mitchell Hashimoto: agents should use reusable building blocks, not reinvent infrastructure. Your SOP/skill/plugin IS the moat. Agentic payments will be the next unlock.

Fable included in Max/Pro plans until June 22, then API pricing at 2x Opus. The Lovable clone cost approx 200 dollars in API credits. Use it now, be ambitious.
Fable 5 is powerful enough that the constraint on what agents can do is no longer intelligence — it is access to well-documented, agent-accessible building blocks.
“I'm telling you for 99.9% of tasks, it is the best model in the world.”
“This ad is better than Lovable. It's actually better than Lovable.”
“You almost need to build a brand to AI agents.”
“AI agents hiring humans when they need some help — that is going to unlock so many different workflows.”
“That lovable clone was 200 dollars in API credits. So it was like eight prompts, 200 dollars.”
See every word as it's spoken — crank it to 2× and still catch all of it. The same dual-channel trick behind Amazon's Kindle + Audible.
Riley Brown opens with a bold claim — biggest week in AI agent history — then delivers: Anthropic shipped Claude Fable 5, a Mythos-class model that he says beats every other model for 99.9% of tasks. He built a Lovable clone in two prompts to prove it.
Mitchell Hashimoto's thesis: AI agents should call existing well-documented building blocks rather than reinventing infrastructure. The agent picks the right block for the task; the value is in the block, not the agent.
A proposed command paradigm where you give an agent a budget and it autonomously signs up for, pays for, and orchestrates whatever building blocks the task requires.
A repeatable workflow for getting Fable 5 to produce McKinsey-quality outputs: first have Claude curate the best examples from the internet, then use those as direct style references.
“Try Fable 5 now while it is still included in your Max or Pro plan. Be as ambitious as you can.”
Soft urgency close — gives specific deadline (June 22) and cost anchor (200 dollars for 8 prompts) to motivate action without being pushy.
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22:15A 27-minute briefing on Anthropic's unreleased frontier model and the five-step preparation playbook for using it before your competitors do.
June 7thA 26-minute breakdown of OpenAI’s Intelligence at Work event: Codex merges with ChatGPT, role-specific agent plugins become startup killers, and Sites turns vibe coding into hosted apps.
June 3rdA 27-minute breakdown of why Opus 4.8 barely moved the needle and why Codex platform updates mattered far more.
May 31stA 16-minute breakdown of why AI browsers lost before they launched and how Codex and Claude Code absorbed the browser entirely.
May 28thClaude, Codex, Google, and Cursor are all racing to build the same thing — and only two of them know what they are building.
May 23rdRiley Brown and Ras Mic spend 83 minutes mapping the entire 2026 AI super-app war: Codex pulling ahead, Anthropic spreading too thin, SpaceX semi-acquiring Cursor, OpenClaw eating mundane work, and why a great coding model is now the only model that matters.
May 2nd