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Not sure where to start? This week’s hottest software, models and stacks in three minutes.

AI Apps▾

AI software people use: from assistants like ChatGPT to tools for coding, video and workflows, picked by purpose.

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Software for AI: tools that let your agent (Claude Code, Codex, Cursor…) browse, read docs, run code and remember.

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Choose models, estimate cost, self-host: prices, rankings, benchmarks, free tiers and compute.

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A goal or an error message? Ready-made stacks, steps and fixes by scenario.

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// Course · stage 8 of 9

RAG, Agents & AI Engineering

Embeddings and retrieval, RAG, tool calling and MCP, agent design, evaluation and launch.

Start the first unit → All stages

4 unitsabout 36 hours26 algorithms

01Units in this stage

In order. Each unit has goals, algorithms, must-read papers, a project and a self-test.

01 · U80 Embeddings, Vector Search & Reranking BM25, sentence embeddings, DPR, ColBERT, HNSW, PQ and hybrid search. 8 h10 algorithms4 papers 02 · U81 RAG Engineering & Evaluation Chunking, query rewriting, HyDE, GraphRAG, citations and evaluation metrics. 8 h4 algorithms3 paperslesson ready 03 · U82 Agents: Tool Use, MCP, Planning & Memory ReAct, function calling, MCP, reflection, memory, multi-agent systems, computer use and sandboxes. 12 h10 algorithms4 paperslesson ready 04 · U83 AI Engineering: Evals, Cost & Shipping Your own eval sets, LLM judges, observability, model gateways, cost control and product design. 8 h3 algorithms1 papers

02Algorithms you will meet

Algorithms Atlas →

BM25Sentence Embeddings (Sentence-BERT)Dense Passage Retrieval (DPR)ColBERT (Late Interaction)HNSW (Hierarchical Navigable Small World)Product Quantization (PQ)FAISS (Billion-scale GPU Similarity Search)Matryoshka Representation LearningContrastive Learning (InfoNCE)Cross-Encoder RerankingRetrieval-Augmented Generation (RAG)HyDE (Hypothetical Document Embeddings)GraphRAGLLM-as-a-JudgeReAct (Reason + Act)ToolformerFunction Calling / Tool UseModel Context Protocol (MCP)ReflexionGenerative Agents (Memory & Reflection)Agent–Computer Interface (SWE-agent)Tree of ThoughtsMulti-Agent Conversation (AutoGen)MemGPT (Hierarchical Agent Memory)Speculative DecodingRadixAttention (Prefix Caching)

Part of these routes: Everyday Users · Application Developers · Product Managers & Leaders · Domain Scientists

Data updated: AI algorithms & curriculum(UTC+8)