The AI terms that
actually matter.
Clear, technical definitions of 146 key concepts — written by AI engineers, not marketers.
Entity-Rich Semantic Structuring
Entity-rich semantic structuring is the practice of organizing content around named entities (people, organizations, products, places, concepts) and their explicit relationships, expressed consistently in prose, semantic HTML, and structured data, so that knowledge-graph builders and AI search engines can extract, disambiguate, and cite it. It is the entity-centric core of semantic SEO and generative engine optimization.
Read definitionFlash Attention
Flash Attention is an I/O-aware, exact attention algorithm that fundamentally solves the memory wall in Transformer models. By fusing operations and minimizing costly reads/writes between the GPU's High Bandwidth Memory (HBM) and SRAM, it significantly speeds up processing and enables massive context windows.
Read definitionFlash-Tier / Sparse-Linear Architecture
Flash-tier models are a 2026 class of frontier-adjacent language models (GLM-5.3-Flash, Step 3.5 Flash) that pair a sparse mixture-of-experts backbone with a hybrid sparse-and-linear attention mechanism to deliver near-frontier quality at a fraction of the serving cost. The attention design mixes cheap linear attention for local context with selective sparse attention for the long-range dependencies that actually need it.
Read definitionGemma 3n E4B
Gemma 3n E4B is Google's mobile-first, multimodal (text, image, audio) model that uses a nested MatFormer architecture and Per-Layer Embeddings to run an 8-billion-parameter model in roughly 3GB of accelerator memory, making it one of the cheapest ways to get capable multimodal inference, whether served via a hosted API at a fraction of median pricing or run entirely on-device for zero marginal cost.
Read definitionGemma 4
Gemma 4 is Google DeepMind's fourth-generation family of open-weight multimodal AI models, spanning four sizes (E2B, E4B, 26B MoE, 31B Dense), built from the same research as Gemini 3 and designed for advanced reasoning, agentic workflows, and on-device deployment.
Read definitionGenerative AI (Gen AI)
Generative AI is a branch of artificial intelligence that creates new content or data patterns mimicking human-like creativity, based on learned information from existing datasets.
Read definitionGenerative Engine Optimization (GEO)
Generative Engine Optimization (GEO) is the process of optimizing content to be discovered, retrieved, and cited by AI-driven generative search engines like Perplexity, ChatGPT, and Google AI Overviews.
Read definitionGLM-5.1
GLM-5.1 is an open-weight 754-billion-parameter Mixture-of-Experts model from Z.AI that achieves state-of-the-art results on SWE-Bench Pro and can sustain autonomous agentic execution for up to 8 hours on a single task.
Read definitionGLM-5.2
GLM-5.2 is Z.AI's open-weight (~753B-parameter Mixture-of-Experts) flagship, released June 2026 under the MIT License. It pairs a genuinely usable 1-million-token context window with best-in-class open agentic-coding performance — 62.1 on SWE-bench Pro and 81.0 on Terminal-Bench 2.1 — at roughly one-sixth the price of comparable frontier models.
Read definitionGoogle Agent Development Kit 2.0 (ADK 2.0)
ADK 2.0 is the second major version of Google's open-source Agent Development Kit. It replaces the 1.x hierarchical agent executor with a graph-based workflow runtime in which agents, plain functions and tools are all nodes, so developers decide in code (not in a prompt) which step runs next. It offers three ways to compose agents (graph, dynamic and collaborative workflows), checkpointed execution, native human-in-the-loop pauses and a Task mode for agent-to-agent delegation, and it reached general availability in Python (May 2026), Go (June 2026) and TypeScript (August 2026).
Read definitionGoogle AI Edge Eloquent
Google AI Edge Eloquent is Google's on-device dictation and voice-editing app that transcribes speech and rewrites it into polished text entirely on-device, using Gemma 3n on iOS and Gemma 4 12B on macOS, without sending audio to a server unless the user opts into cloud mode.
Read definitionGoogle Gemini 3
Gemini 3 is Google's frontier multimodal model family, launched November 18, 2025 and deployed the same day across Search, the Gemini app, Vertex AI, and the Gemini CLI. It spans four tiers (Flash-Lite, Flash, Pro, and the reasoning-maximized Deep Think), exposes reasoning depth through a discrete thinking_level parameter instead of a raw token budget, and pairs with Google's new agentic IDE, Antigravity.
Read definitionStay ahead of the curve
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