Key Information

Models

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We offer a range of models supporting multiple use cases and modalities.

Grok 4.3

New

Strong agentic tool calling with minimal hallucinations. Supports non-reasoning mode.

Context1 million tokens
Input$1.25 / 1M tokens
Output$2.50 / 1M tokens
ReasoningConfigurable
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Voice API

Real-time conversations, speech-to-text, and text-to-speech.

Agent$3.00 / hour
TTS$15.00 / 1M characters
STT
LatencySub-second
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Imagine API

Turn ideas into reality with image and video generation.

ModesGeneration & editing
SpeedIndustry-leading
Image · 1K / 2K$0.02 / image
Video · 480p / 720p$0.05 / sec
Read docsTry in playground
Model retirement · May 15, 2026

Several older models will be retired on May 15 at 12:00 PM PT, including grok-4-1-fast, grok-4-fast, grok-4, grok-code-fast-1, and grok-imagine-image-pro. Requests to deprecated text model slugs will redirect to grok-4.3 and will be charged at the standard grok-4.3 pricing. See the migration guide for details.

Which model should I choose?

Your choice depends on your use case. We have dedicated models and API’s for audio, image, and video capabilities. For everything else, use Grok 4.3. It is the most intelligent and fastest model we’ve built.

Use case
Model
Chat
Grok 4.3
Coding
Grok 4.3
Images
Grok Imagine API
Videos
Grok Imagine API
Voice
Grok Voice API

Additional Information Regarding Models

  • No access to realtime events without search tools enabled
    • Grok has no knowledge of current events or data beyond what was present in its training data.
    • To incorporate realtime data with your request, enable server-side search tools (Web Search / X Search). See Web Search and X Search.
  • Chat models
    • No role order limitation: You can mix system, user, or assistant roles in any sequence for your conversation context.
    • logprobs and top_logprobs are not supported by models grok-4.20 and newer. These fields will be silently ignored if set.
  • Image input models
    • Maximum image size: 20MiB
    • Maximum number of images: No limit
    • Supported image file types: jpg/jpeg or png.
    • Any image/text input order is accepted (e.g. text prompt can precede image prompt)

The knowledge cut-off date of Grok 3 and Grok 4 is November, 2024.

Model Aliases

Some models have aliases to help users automatically migrate to the next version of the same model. In general:

  • <modelname> is aliased to the latest stable version.
  • <modelname>-latest is aliased to the latest version. This is suitable for users who want to access the latest features.
  • <modelname>-<date> refers directly to a specific model release. This will not be updated and is for workflows that demand consistency.

For most users, the aliased <modelname> or <modelname>-latest are recommended, as you would receive the latest features automatically.

Last updated: May 12, 2026