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A Guide to Implementing Anthropic’s Contextual Retrieval with Python

By IT From Zero October 30, 2026

Anthropic's Contextual Retrieval eliminates context loss during document chunking in RAG. Learn how to automatically prepend context using Python and Claude 3 Haiku with Prompt Caching.

Optimizing LLM API Costs: Prompt Caching, Batching, and Eliminating Unnecessary Tokens

By IT From Zero March 7, 2026

Skyrocketing LLM API bills usually come down to 3 causes: repeated system prompts, piecemeal requests, and wasted tokens in prompts. This article covers 3 practical techniques — prompt caching, batch processing, and prompt compression — to cut costs by 50–80%, with concrete Python code examples.