xAI models

Grok Voice TTS 1.0 reads text aloud in 20 or more languages and detects the language by itself. Its built-in voices are named Eve, Ara, Rex, Sal and Leo, and short tags in the text set speed, pitch, pauses, emphasis and style. You get a sound file such as MP3 or WAV, with at most 15,000 characters at a time. It only speaks; Grok STT 1.0 does the reverse and writes speech down.

The 2.0 release of Grok Imagine Image, turning prompts into pictures and editing from up to three references at 1K or 2K, in low or medium quality mode; the Quality model is its photorealistic sibling

Grok STT 1.0 listens to a recording and writes down what was said, with a time for every word. It can mark who is speaking and handles recordings with several audio channels. Pick it when you need a written record of a recording with times and speakers. It only turns speech into text; Grok Voice TTS 1.0 does the reverse and reads text aloud.

Grok Imagine Video 1.5 makes a video from a written description, with an optional starting picture to set the scene. You can direct how the subject and camera move, the pacing and the mood, and it can add matching sound effects, background sound and spoken lines. Pick it for the best quality of the three. Grok Imagine Video 1.5 Lite is quicker, and Grok Imagine Video takes up to seven reference pictures.

The distilled, lower-cost Grok Imagine Video 1.5, turning a prompt or a still into 1 to 15 second clips at 480p, 720p or upscaled 1080p, trading some quality for speed where the full 1.5 keeps it

Grok Imagine Video makes a clip of 1 to 15 seconds at HD or smaller, from a written description alone, from a still picture it animates, or from up to seven reference pictures that keep characters, styles and settings consistent. It offers seven shapes, from square to wide to tall.

#5 for mobile apps · Grok 4.7 takes text and pictures and writes text, keeping about 500 pages in mind at once. It is the flagship of the Grok line for coding, long jobs with many steps and office work, and it is especially strong at software tasks that run for hours, checking its own work as it goes. It also drafts documents and presentations.

#6 for games · Coding, knowledge work and STEM at frontier level, reading text, images and files with reasoning, tool calls and structured output; the Grok 4.5 release, before Grok 4.6 and Grok 4.7

#2 for mobile apps · Coding, knowledge work and science and maths reasoning over long inputs, with tool calls and JSON output

#8 for slide decks · Grok 4.3 takes text and pictures and writes text, keeping about 1,000 pages in mind at once with no cap on the length of its answer. It thinks before it answers, at a level you choose from none to high, low by default. Pick it for analysing long documents, deep research and jobs needing accurate facts. Grok 4.7 reads about 500 pages and is aimed at coding.

#3 for slide decks · A Grok reasoning model built around fast agentic tool calls and strict prompt adherence, which its maker says hallucinates less than anything else on the market, reading text, images and files

Grok Build 0.1 takes text and pictures and writes text, keeping about 250 pages in mind at once. It is a fast model made for coding assistants, working through software jobs step by step with the tools you connect to it, and it powers Grok's coding tool for the command line. It is in early access.

Grok 4.20 Multi-Agent takes text, pictures and files and writes text. It runs several helpers at once on one research job, and they coordinate their tools and combine what they find: 4 helpers at low or medium effort, 16 at high. Pick it for deep research that has many parts. For an ordinary question with one answer, plain Grok 4.20 is enough.

#8 for slide decks · Grok 4.3 takes text and pictures and writes text, keeping about 1,000 pages in mind at once with no cap on the length of its answer. It thinks before it answers, at a level you choose from none to high, low by default. Pick it for analysing long documents, deep research and jobs needing accurate facts. Grok 4.7 reads about 500 pages and is aimed at coding.

#5 for mobile apps · Grok 4.7 takes text and pictures and writes text, keeping about 500 pages in mind at once. It is the flagship of the Grok line for coding, long jobs with many steps and office work, and it is especially strong at software tasks that run for hours, checking its own work as it goes. It also drafts documents and presentations.

#2 for mobile apps · Coding, knowledge work and science and maths reasoning over long inputs, with tool calls and JSON output