AgentStack Notes

Practical notes on AI agents, LLMs, and paying for compute.

Compare

• Gemini 2.5 Pro vs Claude Opus 4
  Compare Gemini 2.5 Pro and Claude Opus 4 to find the best fit for your needs
• DeepSeek R1 vs O3-Mini: Reasoning Comparison
  Discover which AI model excels in reasoning tasks: DeepSeek R1 or O3-Mini. Get the verdict and choose the best fit for your needs.

How-to

• Add X402 Paywall to FastAPI
  Protect your FastAPI app with a secure paywall, learn how to integrate X402
• Claude Sonnet 4.5 API Tutorial
  Learn to integrate Claude Sonnet 4.5 API for AI-powered text analysis and generation
• How to Build a Multi-Agent System in Python
  Learn how to build a multi-agent system in Python with step-by-step instructions and ready-to-use code for efficient agent collaboration.
• How to Use DeepSeek R1 for Reasoning Tasks in Python
  Learn step-by-step how to use DeepSeek R1 for reasoning tasks on Ubuntu with Python. Includes copy-pasteable code and practical tips.
• How to Call GPT-4o from Python Using HTTPX
  Learn how to call GPT-4o from Python with HTTPX. Follow this step-by-step guide to send API requests and handle responses easily.

Explainer

• MCP Model Context Protocol
  Understand the MCP model context protocol and its benefits in plain English
• X402 Payment Protocol Explained
  Learn how X402 streamlines transactions, reducing costs and increasing security
• USDC on Base Network Explained for AI Payments
  Learn how USDC on Base Network streamlines AI payments with fast, low-cost transactions. Discover its benefits and practical uses.

Pricing

• Cheapest GPT-4 Calls
  Discover the most cost-effective ways to call GPT-4, maximizing your budget
• Autonomous AI Agent Costs
  Discover the benefits of estimating costs for running AI agents 24/7

Best-of

• Best Cheap LLM Models for Coding
  Discover affordable LLM models for coding, boosting productivity without breaking the bank
• Cheap Reasoning Models
  Discover affordable reasoning models under $0.01 per call, boosting AI efficiency
• Top LLM APIs with Pay-Per-Call Pricing
  Discover the best LLM APIs offering pay-per-call pricing. Compare features, pros, and cons to find the right solution for your AI projects.