# llms.help > Current, source-backed guidance for developers working with language models. Canonical site: https://llms.help/ Updated: 2026-07-18T15:22:25+02:00 Every listed article is a public, immutable revision. Material claims are linked to visible sources. Automated research and drafting are subject to evidence, originality, style, safety, and technical verification gates. ## Core sections - [Verified tutorials](https://llms.help/tutorials) - [Practical guides](https://llms.help/guides) - [Model comparisons](https://llms.help/comparisons) - [Release analysis](https://llms.help/news) - [Model index](https://llms.help/models) - [Agent directory](https://llms.help/agents) - [Dated model and agent rankings](https://llms.help/rankings) - [Provider directory](https://llms.help/providers) - [LLM glossary](https://llms.help/glossary) ## Editorial trust - [Editorial policy](https://llms.help/editorial-policy) - [Source standards](https://llms.help/sources) - [AI assistance disclosure](https://llms.help/ai-disclosure) - [Corrections](https://llms.help/corrections) ## Latest verified content - [Designing Human-in-the-Loop AI Systems](https://llms.help/guides/human-in-the-loop-ai): Place human review where it changes risk: define authority, evidence, escalation paths, feedback quality, and audit records. - [Context Window: What It Means and What It Does Not](https://llms.help/glossary/llm-context-windows): A direct definition of context windows, token budgets, usable context, position effects, and practical input design. - [Embeddings: A Developer-Friendly Definition](https://llms.help/glossary/embeddings-explained): Understand what embedding vectors represent, how similarity search uses them, and how to test whether they fit your retrieval task. - [Open-Weight vs Hosted LLMs: A Workload-First Comparison](https://llms.help/comparisons/open-source-vs-proprietary-llms): Compare deployment control, privacy boundaries, reliability work, model quality, licensing, and total cost without a universal winner. - [Retrieval-Augmented Generation: A Practical Tutorial](https://llms.help/tutorials/retrieval-augmented-generation-guide): Design a small RAG system with traceable ingestion, retrieval, context assembly, citations, and stage-by-stage evaluation. - [Prompt Engineering Fundamentals](https://llms.help/tutorials/prompt-engineering-fundamentals): Build prompts as testable contracts with explicit inputs, constraints, examples, output formats, and failure handling. - [How to Choose the Right LLM for Your Application](https://llms.help/guides/choose-the-right-llm): A durable, task-first framework for comparing model quality, reliability, latency, privacy, and total operating cost. - [How Large Language Models Work](https://llms.help/guides/how-large-language-models-work): A practical mental model for tokens, attention, training, inference, context, and the limits of generated answers.