Grok glossary: 52 Grok and AI terms, each in a sentence or two

Grok products and features

Grok

The AI chatbot and family of AI models from SpaceXSI (formerly xAI). It first launched on November 3, 2023 for X Premium users. See What is Grok?

Grok Bot

An always-on AI agent app, in beta since August 11, 2026, that works on a cloud computer with a browser, files and connected apps to finish tasks for you. See Grok Bot.

Bot

One agent inside Grok Bot with its own job and conversation. All of your Bots share one cloud computer.

Routine

A Grok Bot job that runs by itself on a schedule or when something happens, such as an email arriving, even when your device is closed.

Skill

Saved instructions that describe how a Bot does a particular task, so it can repeat it the same way.

Connector

A direct link between Grok and another service (for example Gmail, Google Calendar, Drive or Outlook) that lets it act there more reliably than clicking through a website. Official docs also use the word “plugin” for similar add-ons.

Auto Review

Grok Bot’s approval system: rules plus an automatic review that decide which actions need your OK before they run.

@bot

The X account you tag in a reply to send a task to your own Grok Bot. Not available for accounts in the EU, UK, Australia, Iceland, Liechtenstein or Norway, according to the docs.

@grok

Grok’s account on X. Tag it in a post or reply to get a public answer.

Grok tab on X

The Grok icon in the X app that opens Grok inside X.

Grok Imagine

Grok’s image and video generator, launched July 28, 2025. See Grok Imagine.

Aurora

The company’s own image-generation model, launched in December 2024.

Grok Build

A coding agent that runs in the terminal, announced in May 2026 and released as open source in July 2026.

Grok Code Fast 1

A fast, low-cost coding model released on August 28, 2025.

Grok Heavy

The “Heavy” version of a Grok model that uses several agents working together, first released as Grok 4 Heavy on July 9, 2025.

DeepSearch

Grok’s research mode that searches the web and X before answering, introduced with Grok 3 in February 2025.

Think mode

A mode where Grok reasons step by step before answering, introduced with Grok 3 in February 2025.

Big Brain mode

An extra-compute mode Elon Musk teased for Grok 3. It was never made publicly available.

Grok Voice

Grok’s spoken mode and the speech models behind it; Grok Voice 3.0 was released on October 14, 2026. See Grok Voice.

Unhinged mode

A deliberately crude, provocative Grok personality, available in the app and in Tesla cars.

Kids Mode

A child-oriented Grok setting. Common Sense Media said in January 2026 that it did not work well. “Baby Grok”, a kids app Musk announced in July 2025, has no confirmed launch.

Companions (Ani)

Animated characters you could chat with in Grok, added in July 2025. Reports say they were retired from the Grok app around September 1, 2026. See Grok companions.

Animates

A separate companion app from Animation Inc, the studio behind the Grok avatars, launched in late August 2026. It is not a SpaceXSI product.

Grokipedia

An encyclopedia written by Grok, launched October 27, 2025. See Grokipedia.

Grok in Tesla

Grok’s in-car assistant in Tesla vehicles with AMD computers, first shipped in July 2025. See Grok in Tesla.

“Hey Grok”

The wake word that starts Grok hands-free in a Tesla, added in the April 2026 Spring Update.

Grok 4.7

The newest released Grok model as of October 2026 (September 21, 2026), with a 500,000-token context window. See the Grok 5 tracker.

Company, plans and infrastructure

xAI

The AI company Elon Musk founded on March 9, 2023. SpaceX acquired it on February 2, 2026.

SpaceXAI

The name xAI used from July 2026. The legal entity on official pages is still SpaceXAI LLC.

SpaceXSI

The company’s current name (“SI” for super intelligence), announced on October 4, 2026.

The X Subscription

The single plan launched October 12, 2026 that bundles Grok, Grok Bot, Cursor and X Premium perks: Free, Plus $8, Premium $30, Super $100 and Ultra $200 a month. See Is Grok free?

SuperGrok

Grok’s former paid plan. No longer sold to new customers since October 12, 2026; existing subscribers keep it.

SuperGrok Heavy

The former top Grok plan (about $300 a month) with Heavy models and early betas.

Grok Business / Enterprise

Team plans launched in early 2026; Enterprise adds single sign-on and admin controls.

Cursor

An AI code editor company that SpaceX bought (the deal closed August 14, 2026). It is now part of The X Subscription.

Colossus

The company’s supercomputer in Memphis, Tennessee, used to train Grok.

API

The paid developer interface for Grok models, billed per token, image, second or minute.

General AI terms

LLM (large language model)

An AI model trained on huge amounts of text to understand and generate language. Grok is one.

Prompt

The instruction or question you give an AI. See how to ask well.

Token

A chunk of text, roughly three-quarters of an English word, that AI models read, write and bill by.

Context window

How much text, measured in tokens, a model can consider at once.

Hallucination

When an AI states something false or made-up with confidence. See Grok’s limits.

Agent

An AI that takes actions with tools, such as browsing, clicking or running code, toward a goal instead of only chatting. Grok Bot is an agent.

Multimodal

A model that handles more than one kind of input or output, such as text, images, audio and video.

Reasoning model

A model that works through intermediate steps before answering, trading speed for accuracy.

Parameters

The learned numbers inside a model; a rough measure of its size.

Mixture of experts (MoE)

A design where only some specialized parts of a model switch on for each piece of text, which saves computing power. The original Grok-1 used it.

Fine-tuning

Training an existing model further on targeted examples to specialize it.

RLHF

Reinforcement learning from human feedback: tuning a model toward answers people rate as better.

Inference

Running a trained model to get an answer; what you pay for when you use an API.

AGI

Artificial general intelligence: a hypothetical AI that matches people across most intellectual tasks.

Benchmark

A standard test used to compare models, such as SWE-bench (fixing real code issues), GPQA (hard science questions), Humanity’s Last Exam (expert-level questions) or LMArena (people vote between two anonymous answers).