Why on-device agentic AI can't keep up

📰 Dev.to · Martin Alderson

On-device AI agents face limitations due to KV cache scaling, RAM budgets, and inference speed, making them less viable in practice

advanced Published 1 Mar 2026
Action Steps
  1. Analyze KV cache scaling limitations on your device
  2. Evaluate RAM budgets for on-device AI agents
  3. Test inference speed on your target hardware
  4. Compare performance metrics with theoretical expectations
  5. Optimize on-device AI agent design based on findings
Who Needs to Know This

Developers and engineers working on AI-powered devices and systems will benefit from understanding these limitations to make informed design decisions

Key Insight

💡 On-device AI agents are limited by hardware constraints, making them less effective in practice

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🚨 On-device AI agents: great in theory, but maths says otherwise 🤔

Key Takeaways

On-device AI agents face limitations due to KV cache scaling, RAM budgets, and inference speed, making them less viable in practice

Full Article

On-device AI agents sound great in theory. The maths on KV cache scaling, RAM budgets, and inference speed says otherwise.
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