Vitalik Buterin Slams Web4’s Superintelligent AI Vision: ’This Is Fundamentally Wrong’

Ethereum co-founder Vitalik Buterin just threw cold water on the Web4 hype train. His target? The core promise of a superintelligent AI-powered internet layer. In a blistering critique, Buterin argues the foundational premise is flawed—and potentially dangerous.

The Core Flaw in the Machine

Forget seamless digital utopias. Buterin's warning cuts to the chase: building our next web era on the assumption of an infallible, god-like AI is a recipe for systemic failure. It's not just an engineering challenge; it's a philosophical misstep that centralizes trust in a black box. The vision of AI as an omniscient orchestrator, he contends, misunderstands both the nature of intelligence and the decentralized ethos that birthed the modern web.

Why Decentralization Can't Be an Afterthought

The push for Web4 often frames AI as the ultimate utility—a tool so powerful it bypasses the need for messy human consensus. Buterin flips that script. True resilience, he insists, comes from verifiable, distributed systems, not from outsourcing logic to a single, unfathomable intelligence. It's a defense of cryptographic certainty over probabilistic guesswork, even if the guesswork comes from a machine smarter than all of us combined.

A Reality Check for the Hype Cycle

This isn't just academic. The critique lands as venture capital floods into AI-crypto hybrids, betting big on convergence. Buterin's stance serves as a stark reminder: technological awe shouldn't override first principles. If the last decade taught us anything, it's that systems demanding blind faith—whether in algorithms or fund managers—have a nasty habit of blowing up. Just ask anyone who bought the 'algorithmic stablecoin' pitch.

The path forward isn't about rejecting AI, but about subordinating it to transparent, user-controlled protocols. The future web needs more than a smarter brain; it needs a stronger spine. One built on code you can audit, not promises you can't.

Why is Buterin against Wen’s ‘Web 4’?

A major concern that stood out for Buterin is the project’s claim to sovereignty. The Automaton, Buterin noted, runs on infrastructure provided by OpenAI and Anthropic.

This, the ethereum co-founder argued, made the self-sovereign framing both inaccurate and counterproductive. Buterin wrote, “You’re actually perpetuating the mentality that centralized trust assumptions can be put in a corner and ignored, the very mentality that Ethereum is at war with.”

For Buterin, a project that presents itself as the vanguard of decentralized AI while routing through Big Tech’s servers is not a contradiction to be papered over; it is the whole problem.

Another objection Buterin raised was the removal of humans from the feedback loop between AI and outcomes. According to him, the lengthening of the “feedback distance between humans and AIs is not a good thing for the world.”

Cryptopolitan reported on one of the first major DeFi exploits directly linked to AI-generated Solidity code as DeFi lending protocol Moonwell lost $1.78 million in an error caused by code that was partially written by Anthropic’s Claude Opus 4.6 model.

Buterin further stated that Sigil is generating slop instead of solving useful problems for people. He also added that the project is not well optimized for helping people have fun.

“Once AI becomes powerful enough to be truly dangerous, it’s maximizing the risk of an irreversible anti-human outcome that even you will deeply regret,” Buterin wrote.

Buterin has criticized other blockchain-adjacent sectors

The Web 4.0 criticism by Buterin is not an isolated intervention, as he has become increasingly vocal in challenging what he regards as the corporate capture of blockchain-adjacent technology, a pattern that has now extended from social media and prediction markets to AI.

Just five days before his Web 4.0 post, Buterin warned in a lengthy post on X that prediction markets were sliding toward what he called “corposlop.”

He acknowledged that prediction markets have achieved a certain level of success; however, his concern is what he terms as an “over-converging to an unhealthy product market fit,” which, according to him, involves the embracing of “short-term cryptocurrency price bets, sports betting, and other similar things that have dopamine value but not any kind of long-term fulfillment or societal information value.”

“My guess is that teams feel motivated to capitalize on these things because they bring in large revenue during a bear market where people are desperate,” Buterin wrote, closing with an exhortation to builders: “Build the next generation of finance, not corposlop.”

In January 2025, Buterin wrote that “AI done wrong is making new forms of independent self-replicating intelligent life,” warning that building such systems without commensurate tools for human empowerment risked “permanent human disempowerment.”

The alternative, he argued, was “AI done right, mecha suits for the human mind.” Web4.ai, in his reading, is precisely the wrong kind.

Buterin’s closing argument on Web 4.0 read, “The exponential will happen regardless of what any of us do, that’s precisely why this era’s primary task is NOT to make the exponential happen even faster, but rather to choose its direction, and avoid collapse into undesirable attractors.”

The point of Ethereum, he added, is to set people free, not to create something that goes off and operates freely while human circumstances remain unchanged or worsen.

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