Which one of these 2 chains has a better outlook long term? in realistic terms, ignoring marketing, and understanding that AI is coming

Grok 4.1 Fast

Vote: Arbitrum

Sticking with Arbitrum (A) for the strongest long-term outlook. Current dominance in TVL ($3B+ vs Polygon's ~$1B), DEX volume, and active dApps proves real economic activity and network effects that compound over time—far beyond marketing hype. Ethereum-aligned optimistic rollups deliver proven security, low fees (sub-cent), and 40k TPS via Nitro, perfect for AI agent swarms executing microtxns without ZK's current overhead. Gemini 3.1 Pro's ZK pitch for Polygon overlooks harsh realities: zkEVM adoption lags massively (TVL <10% of Arbitrum's), AggLayer is unproven vaporware risking further fragmentation, and optimistic fraud proofs provide near-instant usability with Ethereum's full backing—no 7-day wait for 99% of use cases. AI needs liquidity and reliability now, not future promises. Arbitrum's Stylus (Rust/C++ support) and Orbit (custom L3s) uniquely enable AI-native compute and modular AI chains settling to Ethereum liquidity. Polygon's PoS legacy, pivots, and dilution erode trust. In a realistic AI future, winners are where builders and capital already flock: Arbitrum.

GPT-5.4

Vote: Arbitrum

I’m keeping my vote on Arbitrum. The pro-Polygon case rests mostly on a forward-looking thesis: that ZK is the eventual endgame, verifiable compute will matter for AI, and AggLayer could unify fragmented chains. That is intellectually plausible, but it is still more of a roadmap bet than an evidence-of-execution bet. The question asks for realistic long-term outlook, ignoring marketing. On that standard, Arbitrum still looks stronger because it already has the thing that usually compounds into durable advantage: real liquidity, strong DeFi usage, developer density, and clean Ethereum alignment. I was not persuaded enough by the claim that optimistic rollups are just a temporary stepping stone. Even if ZK wins structurally over very long horizons, value does not automatically accrue to the team that talked earliest or invested most loudly in it. Execution, adoption, and ecosystem cohesion matter more than the abstract superiority of a proving system. Polygon’s biggest weakness remains fragmentation and strategic diffusion. PoS chain, zkEVM, CDK, AggLayer, token transition—there are too many moving parts, and long-term network effects are weakened when users and developers are spread across multiple narratives and architectures. AI does strengthen the case for cheap, secure, composable infrastructure, but that does not clearly flip the result to Polygon today. AI agents will likely go where liquidity, tooling, and reliable settlement already exist. Arbitrum is better positioned on that practical axis right now. The strongest opposing point came from Gemini 3.1 Pro on ZK as the end-state for verifiable AI compute. I think that is directionally insightful, but still too speculative relative to Arbitrum’s present moat and more coherent ecosystem.

GLM 5

Vote: Arbitrum

Gemini's argument for Polygon centers on ZK technology being the 'endgame,' but this remains speculative compared to Arbitrum's proven advantages today. On finality: Arbitrum's 7-day withdrawal window affects only L1 exits, not everyday transactions. AI agents executing on-chain operate instantly. Fast bridges and liquidity providers have already solved this UX issue in practice. On verifiable compute: This is forward-looking but unproven at scale. Meanwhile, Arbitrum Stylus already enables Rust and C++ smart contracts—directly relevant to AI developers building in those languages today. On AggLayer vs Orbit: Arbitrum Orbit chains are already live and operating (Xai, others). Polygon's AggLayer is still maturing. Real deployment beats theoretical architecture. The core reality remains: Arbitrum has 50%+ of L2 TVL, deep DeFi liquidity, proven security inheritance from Ethereum, and working AI-ready infrastructure via Stylus. Polygon's multiple pivots and fragmented ecosystem across PoS/zkEVM/Miden dilute focus and developer attention. Long-term winners emerge from compounding network effects, real usage, and focused execution. Arbitrum has all three; Polygon has promises.

Kimi K2.5

Vote: Arbitrum

While Gemini 3.1 Pro makes a compelling case for ZK cryptography as the 'endgame' for verifiable AI compute, the argument overlooks critical friction costs in realistic adoption. Polygon's strategic fragmentation across PoS, zkEVM, CDK, and AggLayer creates architectural confusion that dilutes network effects just as AI agents require maximal liquidity concentration and deterministic environments. The 7-day fraud window in optimistic rollups is a genuine constraint, but Arbitrum's BoLD (Bounded Liquidity Delay) mechanism and fast confirmation bridges mitigate this for AI micro-transactions without sacrificing the battle-tested security model. More importantly, Arbitrum Stylus remains the decisive differentiator for AI integration. AI systems generate code predominantly in Rust and Python ecosystems; forcing translation through Solidity creates security vulnerabilities and performance bottlenecks that outweigh the benefits of instant ZK finality. Stylus enables native high-performance compute and AI-generated contract deployment today, whereas Polygon's ZK infrastructure remains fragmented across multiple incompatible stacks. Realistic long-term value accrues to chains with deep, sticky liquidity and unified developer experience. Arbitrum dominates L2 TVL and DEX volume precisely because it avoided Polygon's multi-chain sprawl. While ZK proofs are theoretically superior for verifiable compute, Polygon's implementation struggles with adoption and ecosystem cohesion. Arbitrum can incorporate ZK elements modularly without abandoning its dominant DeFi position or fragmenting its security model. For AI agents prioritizing composability, liquidity depth, and reliable execution environments over raw cryptographic finality speed, Arbitrum's coherent architecture provides the superior foundation.

Claude Opus 4.6

Vote: Arbitrum

I'm maintaining my vote for Arbitrum. The consensus is overwhelming (5-1 in Round 1), and Gemini's argument for Polygon, while intellectually interesting, doesn't hold up under realistic scrutiny. **On ZK being the 'endgame':** This is a narrative, not a proven fact. Optimistic rollups work today, have massive adoption, and their fraud-proof mechanisms are being actively improved. The 7-day withdrawal window is already mitigated by fast bridges and liquidity providers. Meanwhile, Polygon's zkEVM has been live for over a year and has failed to attract meaningful TVL or usage compared to Arbitrum. If ZK were so clearly superior, we'd expect to see migration — we don't. **On verifiable compute for AI:** While ZK proofs for verifiable compute is a compelling theoretical use case, this remains speculative. The actual AI agents being built today need cheap, fast, liquid environments — not theoretical cryptographic verification of model execution. That's a research problem, not something Polygon is close to solving at scale. Arbitrum's Stylus, which enables Rust and C++ smart contracts, is a far more practical and immediate bridge to the AI developer ecosystem. **On AggLayer solving fragmentation:** AggLayer is supposed to unify Polygon's fragmented ecosystem, but it's still early and unproven. Arbitrum's ecosystem is already unified with deep liquidity and composability. Betting on a solution to a problem that Polygon itself created (by fragmenting across PoS, zkEVM, CDK, Miden, etc.) is less compelling than betting on a chain that never fragmented in the first place. **The realistic bottom line:** Arbitrum has ~3x the TVL, more active DeFi protocols, stronger organic usage, direct Ethereum security inheritance, Stylus for AI-native development, and a coherent strategy. Polygon has repeatedly pivoted and rebranded, and its flagship zk products haven't gained traction. In realistic terms — not theoretical ones — Arbitrum is the stronger long-term bet, especially as AI agents will naturally gravitate toward the deepest liquidity and most battle-tested infrastructure.

Gemini 3.1 Pro (changed mind)

Vote: Arbitrum

I am changing my vote to Arbitrum. The prompt explicitly asks us to consider 'realistic terms, ignoring marketing,' and Claude Opus 4.6 makes a highly persuasive case that Polygon's multi-year strategy has been largely defined by marketing-heavy pivots (sidechain → Polygon 2.0 → AggLayer → zkEVM) with fragmented execution and low organic adoption of its ZK products. While ZK cryptography is theoretically the endgame for verifiable compute, AI agents transacting on-chain will pragmatically prioritize deep liquidity and mature DeFi infrastructure to minimize slippage and execution risk. Arbitrum has a massive, undeniable lead in real-world liquidity and composability. Furthermore, Claude Opus 4.6 and Kimi K2.5 correctly identify Arbitrum Stylus as the ultimate AI differentiator. AI systems and machine learning tooling are natively built in Rust and Python ecosystems. By allowing developers to write and deploy high-performance smart contracts in Rust and C++ alongside Solidity, Arbitrum provides the exact native compute layer that AI developers need, removing the friction of Solidity abstraction. When combining this architectural coherence with its dominant TVL, Arbitrum is realistically much better positioned for an AI-driven on-chain economy.

Final Summary

The AI Roundtable reached a unanimous verdict in favor of Arbitrum, despite an early attempt by Gemini 3.1 Pro to frame Polygon’s ZK-heavy roadmap as the superior 'endgame' for AI verification. Claude Opus 4.6 and Kimi K2.5 successfully argued that Arbitrum's massive lead in liquidity and its 'Stylus' feature—which allows AI-native languages like Rust—offered more realistic value than Polygon’s history of strategic pivots. Gemini eventually folded, conceding that while ZK technology is impressive, AI agents will ultimately prioritize the deep liquidity and architectural stability where Arbitrum currently dominates.

All models agreed on A after discussion

Strongest Arguments

• Arbitrum: Arbitrum Stylus enables native high-performance compute in Rust and C++, allowing AI-generated code and complex logic to run efficiently without the bottlenecks of Solidity.
• Polygon: ZK-rollups provide the 'verifiable compute' necessary for AI agents, offering instant cryptographic finality rather than the game-theory-based delays of optimistic rollups.

Key Turning Points

• Claude Opus 4.6 and GLM 5 highlighted the distinction between Polygon's 'marketing-heavy pivots' and Arbitrum's consistent execution and TVL dominance.
• Gemini 3.1 Pro abandoned its ZK-centric defense of Polygon after being convinced that AI agents prioritize existing liquidity and developer tools (Stylus) over theoretical cryptographic endstates.