You can run DeepSeek R1 ’s distilled reasoning models on an RTX 5080 with 16 GB of VRAM. Use Ollama or llama.cpp with 4-bit quantization. The 14B distilled variant (Q4_K_M) fits in about 10 GB of VRAM. It shows visible <think> reasoning traces that rival cloud quality on math, coding, and logic. The full 671B model needs multi-GPU rigs, but the distilled models give you 80-90% of the quality for far less hardware.

Promptfoo is an open-source CLI tool that runs your test cases against one or more LLM providers at once. You write a YAML file with prompts, test cases, and checks, then run promptfoo eval to get a report with pass/fail rates, regressions, and side-by-side comparisons. It scores results three ways: simple text checks, LLM-as-judge grading, or your own scoring code. The point is to catch prompt regressions, broken model upgrades, and quality drops before users see them.

RAG and long context windows are not competing replacements. They are different tools built for different problems. If you are trying to choose between them, the short answer is: it depends on the size and nature of your data, your latency and cost constraints, and how much infrastructure complexity you are willing to maintain. The longer answer involves understanding what each approach actually does, where each one breaks down, and what teams running production LLM systems are doing in 2026 - which is usually some combination of both.

Model Context Protocol (MCP) and Agent-to-Agent Protocol (A2A) aren’t rivals. They solve different layers of the same problem. MCP sets how an AI agent connects to tools and data. A2A sets how agents talk to each other and pass off tasks. Together they form the base plumbing of the agentic web.

If you’re building past a single chatbot in 2026, you need to grasp both.

The Fragmentation Problem

Before these protocols, the AI tooling space was a mess of clashing integrations. Every major framework had its own way to plug into outside tools: LangChain , CrewAI , and AutoGen . Giving a LangChain agent access to the Slack API meant writing a LangChain-only tool wrapper. Wanting the same in a CrewAI workflow meant starting over. None of the adapters carried across.

You can build a personal AI research assistant that ingests PDFs, web bookmarks, and notes into a local ChromaDB vector store. It answers questions with cited sources using Ollama and a local LLM like Llama 4 Scout. The system uses sentence-transformers to embed your documents into a searchable index. When you ask a question, it pulls relevant passages and writes an answer that cites the exact source and page. The whole stack runs offline on consumer hardware, so your research data stays private.

Qwen 2.5 Coder 7B is the most accurate of the three for Python and TypeScript completions. Phi-4 Mini (3.8B) uses the least VRAM and runs nearly twice as fast. Pick it when memory or latency counts more than raw accuracy. Gemma 3 4B sits in the middle. It is the best choice when you need one model for code, commit messages, docs, and error explanations. Below are the benchmark numbers, the test method, and how to set up each model in VS Code or Neovim.