Alternatives to D2l Zh

Build a large language model from scratch in PyTorch — a code-first book that walks you through coding a GPT-2 class LLM line by line

ApacheCN 维护的免费开源中文 AI 学习资源库，覆盖 Python、机器学习、深度学习与 NLP 全栈教程。

Kimi Chat is Moonshot AI's agentic workspace where deep research, slides, sheets and sites come back as finished deliverables.

JavaGuide：156K+ Star 的开源 Java 面试与后端知识体系，2026 年新增 AI 应用开发面试与 AI 编程实战指南

Raccoon AI is a collaborative agent that builds apps, decks, docs and designs on its own cloud computer while you watch and steer.

OpenAI o1 was the chain-of-thought reasoning model that started the reasoning era — now deprecated and parked under ChatGPT Legacy models.

AI工程从零开始中文版：528节课、20个阶段的免费开源课程，从线性代数手写实现一路搭到自主Agent集群。

SapienAI is an open, self-hostable agentic research workspace that unites AI agents with collaborative LaTeX, Typst and Markdown writing.

Free 16-chapter Datawhale open-source tutorial that teaches you to build AI agents from scratch in Python, including your own HelloAgents framework.

Free, open-source AI engineering course that rebuilds backprop, tokenizers, attention and agent loops from raw math in Python, TypeScript,

An illustrated O'Reilly guide by Jay Alammar and Maarten Grootendorst that teaches Python developers to build and refine large language models.

Open-source enterprise AI chat and permission-aware search across 50+ connected sources, self-hosted or air-gapped.

中文大模型技术专栏：从Transformer到RAG、微调与LangChain实战

Genspark is an agentic AI workspace that turns one prompt into cited answers, slide decks, dashboards and live web apps.

Undermind is an AI co-researcher for deep literature search that follows citation trails to surface the papers keyword search misses

Sakana AI builds Japanese-specialised LLMs and Fugu multi-model orchestration for finance, defense and intelligence teams.

Silico is Goodfire's interpretability agent for understanding and debugging the internals of your AI models.

Anara is an AI research assistant that searches 300M+ papers and cites every answer to the exact passage in your source.

Wolfram|Alpha answers computable questions with verified results computed from curated data and the Wolfram Language.

AI grant writing software that finds funders, drafts proposals in your voice, and tracks every deadline

SciSpace is an AI research platform for chatting with PDFs, running literature reviews, and writing papers with citations.

Free AI-powered scientific paper search across 239M+ papers with TLDR summaries and citation graphs

Semantic search over 138M papers and 545K clinical trials, with a cited research agent that writes evidence reviews you can defend.

Iris.ai builds an auditable AI knowledge layer so regulated teams can defend every answer in an audit.

Perplexity is a cited AI answer engine that puts clickable sources on every web search answer.

Buildpad runs parallel AI market research agents to validate your startup idea before you build.

Turn one seed paper into a visual citation map across 310+ million academic papers with ResearchRabbit's literature discovery engine.

Turn open-access research papers into audio podcasts and ask them questions by chat.

GAJIX generates a personalized AI curriculum for any subject you name, with adaptive explanations and practice in a browser tab.

AI form builder that turns every Typeform response into automated GTM workflows and AI-moderated research studies