> ## Documentation Index > Fetch the complete documentation index at: https://developers.webai.com/llms.txt > Use this file to discover all available pages before exploring further. # Terminology > webAI product terms and common AI vocabulary for readers new to the app or to AI. Use this glossary when a word in the docs or the app is new. Start with general AI terms, then webAI concepts and surfaces. For how-to steps, open the linked guide. ## General AI | Term | Definition | | -------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Prompt** | The text you send to a model: a question, a statement, or a request. | | **Reply** | The model's response to a prompt. Also called a completion. | | **Token** | A small piece of text a model reads or writes. A word may be one token or several. Speeds in Chat often use **tok/s** (tokens per second). | | **Context window** | How much text (in tokens) the model can consider at once, including the prompt, recent messages, and the reply so far. | | **Prefill speed** | How fast the model processed the prompt, in tok/s. Shown under [Response stats](/using-webai/chat#response-stats). | | **Prompt eval** | Prompt tokens that needed evaluation this turn (total prompt tokens minus cached). Shown under [Response stats](/using-webai/chat#response-stats). | | **Cached prompt** | Prompt tokens reused from the session cache. Shown under [Response stats](/using-webai/chat#response-stats). | | **Decode speed** | How fast the model wrote the reply, in tok/s. Shown under [Response stats](/using-webai/chat#response-stats). | | **Generated tokens** | Tokens in the answer. Shown under [Response stats](/using-webai/chat#response-stats). | | **First token** | Time to the first generated token after prefill. It does not include prompt-eval wall time. Shown under [Response stats](/using-webai/chat#response-stats). | | **Response time** | Prefill plus generation wall time for that turn. Shown under [Response stats](/using-webai/chat#response-stats). | | **Context usage** | Tokens used this turn over the model's **Context window**, shown as used / total with a percent. See [Response stats](/using-webai/chat#response-stats). | | **Parameters** | The learned weights inside a model. A label like "7B parameters" describes size, not speed. | | **Inference** | Running a model to produce a reply from a prompt. | | **System prompt** | Instructions that shape tone, role, and limits before the user prompt. In webAI, Personas and Skills carry this kind of instruction. | | **Temperature** | A setting that makes replies more fixed (lower) or more varied (higher). | | **Model** | The trained program that turns prompts into replies. | | **Local model** | A model that runs on your computer when you choose that path. A cloud model runs on someone else's servers. | | **Quantization** | A smaller, less precise copy of a model that needs less memory. Model settings may ask you to pick a quantization. See [Model](/settings/model). | | **Fine-tuning** | Further training a model on extra examples so it fits a narrower task. | | **LoRA** | A small adapter loaded on top of a base model to specialize behavior without replacing the full model. | | **Embedding** | A numeric representation of text that captures meaning so similar items sit close together. | | **Embedding model** | A model built to turn text into embeddings for search and comparison. | | **Chunk** | A short piece of a longer document, split so search and retrieval can work on manageable units. | | **Chunking** | The process of splitting documents into chunks. | | **Vector search** | Finding text by similarity of embeddings, not only by exact keywords. | | **RAG** | Retrieval-augmented generation: fetch relevant chunks first, then ask the model to answer with that material. | | **Hallucination** | A confident reply that is wrong or invented. | | **Grounding** | Anchoring a reply in supplied documents, tools, or facts instead of relying only on the model's prior training. | | **Tool calling** | Letting the model choose an external action, such as searching Slack, when a prompt needs it. | | **MCP** | Model Context Protocol, a shared format for exposing tools to a model. See [Online & Connectors](/settings/online-connectors). | ## webAI concepts | Term | Definition | | --------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | **Collaborative intelligence** | Specialized AI working with people, not only a single general model in the cloud. In the app that shows up as Personas, Spaces, Chat, Artifacts, and Skills. | | **Intelligence Delivery Network (IDN)** | The connective layer behind peer-to-peer work in webAI. It is the network where intelligence runs, connects, and improves on hardware you control. Read more on the [IDN platform page](https://www.webai.com/platform/intelligence-delivery-network). | | **Peer-to-peer** | Devices connect to each other for collaboration. In Spaces and Contacts, a message, a file, and a Persona call move between those devices. | When you use a [downloaded model](/settings/model), replies can be generated on your machine. Other paths, such as a connected Persona on someone else's device or a tool that reaches an outside service, can send work off your machine. See the [Privacy Policy](https://www.webai.com/webai-app-privacy-policy) for how that data is handled. ## Surfaces | Term | Definition | | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | | **Chat** | Where you send a prompt and use the reply. Threads stay under **History**. See [Chat](/using-webai/chat). | | **Auto** | In Chat, lets webAI choose who answers instead of locking a Persona. | | **Answer as** | On a reply, asks another Persona to take the same prompt. | | **Persona** | A setup with a name, instructions, and tools you can chat with. See [Personas](/using-webai/personas). | | **Connected Persona** | A Persona shared by someone else. It still runs on the device of the person who shared it. | | **Space** | A shared place where invited people collaborate from their own devices. See [Spaces](/using-webai/spaces). | | **Channel** | A conversation inside a Space. Messages copy onto members' devices. | | **Ask anything** | A question you ask with the Space, not a private chat and not a channel message. | | **Shared knowledge** | Documents added in a Space that people collaborating there can search. | | **Admin / Member** | Roles in a Space. Admins invite people and manage the Space. | | **Artifact** | A document a chat produced after you choose **Yes, show dynamic doc**. See [Artifacts](/using-webai/artifacts). | | **Skill** | Saved instructions you apply to a prompt, often with `/` in Chat, or from a custom Persona's **Skills** list. See [Skills](/using-webai/skills). | | **Contacts** | People you add so you can invite them to a Space. See [Contacts](/using-webai/contacts). | | **Generate invite / Pair** | Create a one-time invite, then complete pairing so the other person appears in Contacts. | ## Identity and network | Term | Definition | | --------------- | -------------------------------------------------------------------------------------------------------------------------------------------- | | **ODID** | Your identity on the webAI network. Copy it from [Profile](/settings/profile). | | **IDN User ID** | On the desktop app, the identity used when contacts, conversations, and Spaces copy across paired devices. See [Profile](/settings/profile). | ## Models and device | Term | Definition | | -------------------- | ------------------------------------------------------------------------------------------------------------------------ | | **Downloaded model** | A local model you apply in Settings so Chat and Personas can use it on this computer. See [Model](/settings/model). | | **Thinking mode** | When the selected model supports it, shows **Thinking** and **Thought process** in Chat. | | **Device tier** | A read-only label from this computer's memory. It sets which features start on at setup. See [System](/settings/system). | | **Long-Term Memory** | Facts about you that a chat on this device can use in a later reply. See [Personalization](/settings/personalization). |