2 prompts crush the original! AI influencer successfully clones the development platform Lovable using Claude Fable 5, exclaiming "AGI has arrived"

In less than 24 hours after AI giant Anthropic announced its new flagship model "Claude Fable 5 (internal code name Mythos)," a well-known Silicon Valley AI thought leader Riley Brown dropped a social media bomb. He demonstrated that by inputting just "two prompts" into the model, he successfully cloned and fully outperformed the official app of the renowned AI software platform Lovable. This nearly insane speed of autonomous development caused Riley to exclaim "Mythos is AGI," sparking a wave of shock and debate within the developer community.
(Background recap: Goldman Sachs and Morgan Stanley抢夺OpenAI and Anthropic IPO's lead underwriters! Hidden returns up to $7 billion.)
(Additional background: Anthropic adds distillation detection to Claude Fable 5, can it block Chinese open-source models?)

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• 2 prompts thoroughly crush! Clone performance far surpasses original
• 5 prompts create a full-featured platform! Can even output Swift source code directly
• Is it real AGI or just marketing hype? The community sparks polarized debate

Anthropic released its top-tier model "Claude Fable 5" yesterday (9), whose terrifying software engineering capabilities are rapidly disrupting the entire development scene. Today (10), Taipei time, well-known AI tech community leader Riley Brown (@rileybrown) posted a screen recording that has gone viral across the internet.

In the video, he compares the actual Lovable official iOS app with his "clone version" built with Mythos in a side-by-side test. As of press time, the post on X platform has already surpassed 645k views, received over 4,300 likes, and thousands of shares and bookmarks, directly triggering a reverse invasion alarm of AI against no-code development platforms.

Uhm Guys… Mythos (Fable) is AGI.

On the left is the ACTUAL Lovable Mobile App.

On the right is my Lovable version I built with Mythos in 2 prompts.

My version SMOKED it. pic.twitter.com/1nwasCS5cZ

— Riley Brown (@rileybrown) June 10, 2026

2 prompts thoroughly crush! Clone performance far surpasses original

In a nearly 4-minute test video, Riley Brown demonstrated how he completed this incredible task with just two steps. The first prompt asked Mythos to replicate the overall interface visuals and core programming logic of the Lovable platform; the second prompt instructed the clone system to immediately build a "Notion-style dark note app."

To test the quality, he entered the same development instructions into both the official Lovable and his clone version. The results were shocking: the clone driven by Fable 5 showed "domination" in build speed and real-time preview. Riley’s clone not only supported richer features like headers, underlines, tables, and complex text editing, but also offered smoother in-browser editing and a one-click external browser preview, with UI details surpassing the Lovable official app.

5 prompts to create a full-featured platform! Can even output Swift source code directly

As the community's enthusiasm exploded, Riley Brown continued updating his development progress over the next few hours. In his latest post, he announced that just by increasing prompts to "5," the Lovable clone had evolved into a complete system. Currently, this system has extremely comprehensive features:

• Can build, edit, and preview Web Apps and Mobile Apps simultaneously.
• Built-in cloud sandbox environment, automatically activates upon project opening, with a 60-minute inactivity auto-close mechanism.
• Perfect integration of database and user authentication systems.
• Successfully connected voice-to-text functionality.

Even more astonishing, in another demonstration of building a Swift app, Riley’s clone platform, upon receiving commands, can directly generate pure Swift code and within seconds perfectly preview an "Apple Notes" app inside the platform, even providing a testing installation link. Before this, he claimed to have created a similar Replit-like mobile development tool with just a single prompt.

Is it real AGI or just marketing hype? The community sparks polarized debate

This series of nearly sci-fi displays has triggered intense polarized debate in Silicon Valley’s tech circles. Some skeptical developers believe that what Riley demonstrated is essentially just replicating a relatively simple note-taking app and front-end interface on the same underlying LLM, still far from the cross-domain, autonomous-conscious "Artificial General Intelligence (AGI)." They argue that claims of "AGI arrival" are merely marketing hype.

However, the vast majority of frontline Web3 and AI developers are deeply shocked. They point out that Fable 5’s multimodal evolution in logical reasoning and "long-form complex tasks (Knowledge work)" has already caused a paradigm shift in AI software engineering. Previously, building a software development platform and cloud sandbox environment that would take a full engineering team weeks or months can now, with top-tier AI, be "self-deconstructed and re-optimized" in just minutes with 5 prompts. This revolution in AI-driven software development has only just begun.