The AI terms that
actually matter.
Clear, technical definitions of 115 key concepts — written by AI engineers, not marketers.
OmniFlatten
OmniFlatten is a full-duplex, end-to-end GPT model for seamless voice conversation that converts multi-stream speech and text into a single flattened token sequence, enabling a standard LLM backbone to handle simultaneous listening and speaking.
Read definitionOmniVoice
A massively multilingual open-source TTS model by Xiaomi supporting 646 languages with zero-shot voice cloning and voice design, running 40× faster than real-time.
Read definitionOpenClaw
OpenClaw is an open-source, local-first autonomous AI agent that runs as a persistent daemon on your own hardware, connecting to any LLM backend and operated through messaging platforms like WhatsApp, Telegram, or Discord.
Read definitionOrpheus TTS
A Llama 3-based open-source TTS model by Canopy Labs with human-level expressiveness, inline emotion tag control, zero-shot voice cloning, and real-time streaming — the highest-quality open voice model for conversational AI.
Read definitionPhysical AI
Physical AI refers to embodied artificial intelligence systems designed to sense, comprehend, and interact directly with the physical world, bridging the gap between digital cognition and real-world action.
Read definitionPi (Coding Agent Harness)
Pi is a minimal, open-source (MIT) coding-agent harness created by Mario Zechner (earendil-works). Its thesis: a capable coding agent needs only four tools — read, write, edit, bash — and a tiny system prompt, with everything else added as hot-reloadable TypeScript extensions. Despite shipping without MCP, sub-agents, or plan mode, Pi ranked #2 on Terminal-Bench with Claude Opus.
Read definitionPrompt Engineering
Prompt engineering is the practice of designing and refining the text inputs given to an AI model to reliably produce accurate, useful, and well-formatted outputs — without changing the model's weights.
Read definitionPrompt Injection
Prompt Injection is a critical vulnerability in Large Language Models (LLMs) where malicious, untrusted instructions are embedded into user inputs or external data to manipulate the model into ignoring its safety guidelines and executing unintended actions.
Read definitionProsody
Prosody is the melody, rhythm, and stress pattern of speech, carried by pitch (F0), duration, and energy, which turns flat, monotone synthetic audio into speech that sounds like it means something.
Read definitionQuery Fan-Out
Query fan-out is the technique of expanding a single user query into many related sub-queries, running them concurrently against one or more sources, and fusing the results into one answer. It powers Google's AI Mode and the RAG-Fusion pattern, and it changes what it means to rank for a search.
Read definitionQuery Rewriting
Query rewriting transforms a user's raw query into a different form, a clarified single reformulation, several parallel variants, a higher-level abstraction, or a set of sub-questions, before it reaches the retriever, closing the gap between how people ask and how a corpus is actually indexed. It covers a family of techniques from a small trained rewriter model to LLM-generated multi-query fan-out fused with RRF.
Read definitionQwen 3.5
Qwen 3.5 is Alibaba Cloud’s open-weight LLM series, delivering strong reasoning, long-context support, coding performance, and multilingual capabilities for enterprise AI and agentic workflows.
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