Building & Product

How founders use AI for AI Agents

The resources behind 15 questions founders actually ask, then the questions themselves, each with a straight answer.

On the AI map, 29 October 2026 Decision models Coding agents Agents that do tasks for you AI browsers No-code automation with AI steps

What founders use for ai agents, ranked by how many answers lean on it.

  1. The full stack of costs behind a token price, for founders selling AI products. introl.com Article Inference Unit Economics: The True Cost Per Million Tokens Introl
  2. A hands-on implementation guide with before-and-after cost numbers. digitalocean.com Guide Prompt Caching for Anthropic and OpenAI Models DigitalOcean
  3. Saves you from the premature self-host-a-model cost trap. ml6.eu Article Why 'Cheaper Tokens' Isn't a Good Reason to Own Your LLMs ML6
  4. Why the price curve should keep falling, and what that means for your roadmap. weightythoughts.com Article AI's Plummeting Prices Are a Software Story, Not a Hardware One Weighty Thoughts
  5. The clearest official explanation of what an agent eval actually is. anthropic.com Guide Demystifying evals for AI agents Anthropic
  6. Every question you will have about evals, answered by the field's top teacher. hamel.dev Article LLM Evals: Everything You Need to Know (FAQ) Hamel Husain
  7. The philosophy behind the top-grossing evals course, free to read. hamelhusain.substack.com Article AI Evals For Engineers & Product Managers Hamel Husain
  8. The course that trained 2,000+ people, including teams at OpenAI and Anthropic. maven.com Course AI Evals For Engineers & PMs (Maven course) Hamel Husain & Shreya Shankar
  9. The 60-second version of why evals became the must-have skill. x.com Thread Lenny on evals: watch them build one live Lenny Rachitsky
  10. Written notes of the full workflow: error analysis to automated judges. aakashg.com Guide AI Evals Step-by-Step: Hamel & Shreya Masterclass Aakash Gupta
  11. Explains pass@k and why you must run agent tests many times. cameronrwolfe.substack.com Article Agent Evaluation: A Detailed Guide Cameron Wolfe
  12. Field lessons from teams that moved agents from demo to production. infoq.com Article Evaluating AI Agents in Practice: Benchmarks, Frameworks, and Lessons Learned InfoQ
  13. A single-sitting starter recipe for your first agent eval. zenvanriel.com Guide AI Agent Evaluation: A Practical Step-by-Step Guide Zen van Riel
  14. Covers the metrics that matter: task success, step count, faithfulness. turingcollege.com Guide Evaluating AI Agents: A Practical Guide Turing College
  15. Connects evals to shipping cadence rather than treating them as QA theatre. lennysnewsletter.com Article Building eval systems that improve your AI product Lenny's Newsletter
  16. A worked example you can copy line by line for your own product. arize.com Article AI Evals Course Homework: the Recipe Bot Workflow Arize AI
  17. Surveys the tooling landscape so you do not build eval infrastructure from scratch. medium.com Article AI Agent Evaluation: Frameworks, Strategies, and Best Practices Dave Davies
  18. A checklist to run before you let an agent near customers. getmaxim.ai Article 10 Essential Steps for Evaluating the Reliability of AI Agents Maxim AI
  19. The single most important security idea for anyone deploying agents. simonwillison.net Article The lethal trifecta for AI agents Simon Willison
  20. The same argument in shareable form for your team channel. simonw.substack.com Article The lethal trifecta (newsletter edition) Simon Willison
  21. The full running history of the attack class, from the person who named it. simonwillison.net Article Prompt injection series Simon Willison
  22. Fresh real-world exploits showing this is not theoretical. simonw.substack.com Article Prompt injections as far as the eye can see Simon Willison
  23. The industry-standard checklist, free and framework-agnostic. cheatsheetseries.owasp.org Guide AI Agent Security Cheat Sheet OWASP
  24. Translates the OWASP list into concrete actions for small teams. goteleport.com Article OWASP Top 10 for Agentic Applications: Key Takeaways Teleport

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The questions

What actually is an AI agent, in plain language? An AI agent is software that uses an AI model as its brain to pursue a goal: it plans the steps, uses tools (your email, browser, spreadsheets, code, APIs), ... 19 resources → Why would a founder use agents instead of a chatbot or automation? Chatbots answer questions and classic automation follows fixed if-this-then-that rules; both break the moment a task needs judgment. Agents sit in between: t... 17 resources → What real tasks are founders delegating to agents today? Founders are handing agents inbound sales and lead qualification, customer support, competitor and market research, meeting prep and follow-ups, content draf... 21 resources → How do I build my first agent without being technical? Start with the assistant you already pay for: Claude and Tasks in Gemini run a plain-English job on a schedule. To connect several apps, use Zapier Agents or... 20 resources → Which platform or framework should I build my agents on? Match the tool to who is building. Non-technical founders should start no-code (Zapier Agents, Lindy, n8n) and only graduate when they hit a wall. If you hav... 20 resources → How much do AI agents cost to run, and how do I keep the bill under control? Token prices for equivalent quality fall roughly 10x a year, yet agent bills keep rising because agents burn about 50 times the tokens of a chat: every step ... 20 resources → How do I test an AI agent and know when it's reliable enough to trust? You test agents with evals: a set of real tasks plus grading logic, run repeatedly because the same input can produce different outputs. Start embarrassingly... 17 resources → What can go wrong when an agent acts on my behalf, and how do I keep it safe? The core risk is Simon Willison's lethal trifecta: an agent that reads your private data, sees untrusted content (any email or web page) and can communicate ... 19 resources → What is MCP, and why does it matter for my agents? MCP (Model Context Protocol) is an open standard, started by Anthropic in late 2024 and since adopted by OpenAI and Google, that works like a USB-C port for ... 20 resources → Should I build one agent or a team of agents working together? Start with one. The famous industry debate (Cognition's "Don't Build Multi-Agents" vs Anthropic's multi-agent research system) actually agrees on the fundame... 18 resources → Can coding agents like Claude Code actually build my product? Yes, further than most founders expect: teams like Every ship multiple products with engineers writing almost zero code by hand, and 80-90% of Claude Code it... 20 resources → Is there a real startup opportunity in building vertical AI agents? Yes, and it may be the biggest one of this cycle: YC's partners argue vertical AI agents could be 10x bigger than SaaS because they tap labor budgets, not so... 19 resources → How should I price a product built on AI agents? Per-seat pricing breaks when your product replaces labor instead of assisting it: agents don't have seats. The market is converging on usage and outcome pric... 19 resources → Why do most AI agent projects fail, and what do the winners do differently? MIT's much-cited finding is that 95% of enterprise AI pilots deliver no measurable ROI, and the cause is rarely the model: it's missing context, no workflow ... 19 resources → How do I give my agent the right context and memory so it stops forgetting? Agents fail less because the model is dumb and more because its context window is stuffed with the wrong things: performance measurably degrades as context g... 18 resources →

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