GitHub Copilot is an AI pair-programming tool developed by GitHub and OpenAI, offering code completion, chat, and autonomous agent features across VS Code, JetBrains, and Xcode. Compare features, pricing, and differences with Cursor and Claude Code.

DeepSeek R1 is an open-weight reasoning-focused large language model released by China's DeepSeek in January 2025. It achieves OpenAI o1-level performance using a novel reinforcement-learning-only training approach and is distributed under the MIT License.

A subagent is a specialized AI agent spawned by Claude Code that runs in its own isolated context. Learn how subagents enable parallel processing, specialized roles, and modular automation for complex engineering tasks, based on Anthropic's official specification.

Llama 4 is Meta's open-weight family introduced in April 2025, spanning Scout (17B active, 10M context), Maverick (17B active, 400B total), and the unreleased Behemoth (~2T total). This guide covers pronunciation, the Mixture-of-Experts architecture, multimodal input, licensing, deployment options, Muse Spark's strategic pivot, and how Llama 4 compares to Claude and GPT.

Gemini 2.5 is Google's thinking-family AI model, reasoning through its own thoughts before responding. This guide covers the Pro, Flash, and Flash-Lite tiers, architecture, multimodal inputs, long-context handling, pricing, Gemini 3 successor, and direct comparisons with Claude and GPT models.

Agent Skills are Anthropic's open standard for packaging instructions, scripts, and reference data into folders that Claude can discover and load on demand. This guide covers pronunciation, the SKILL.md manifest, how skills differ from tools and MCP servers, authoring examples, common misconceptions, and the portability implications of the open skill spec.

Claude Desktop is Anthropic's official native client for macOS and Windows, bundling Claude chat, Cowork agent mode, Claude Code, MCP connectors, and local file access into a single application. This guide covers pronunciation, installation, pricing, key features, common misconceptions, and how Claude Desktop compares to the web version.

GPT-4o is OpenAI's unified multimodal flagship handling text, audio, and images. Learn its architecture, the Realtime API, and deployment best practices.

Sora is OpenAI's text-to-video model based on the Diffusion Transformer. Learn how it works, best-practice prompting, and governance considerations.

Claude Projects is Anthropic's context workspace that bundles files, instructions and chats. Learn how it works, how to use it, and how to deploy it at scale.