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xAI

Is Grok 4.3 out? Yes, since April 30, 2026

Yes. Grok 4.3 has been available since April 30, 2026.

A browser notification for each confirmed release in this family. No account or email.

Lab
xAI
Family
Grok
Release date
Source
xAI models doc

What changed

  • context -50 % · Context window compared with Grok 4.20 Multi-Agent, same tier in this family. Went from 2M tokens to 1M tokens.
  • price $1.25 / MTok · Prompt price of Grok 4.3. Grok 4.20 Multi-Agent is the previous model of the same tier, but the gap is beyond what a percentage explains.

About Grok 4.3

Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

Next Grok model to watch

Questions

When was Grok 4.3 released?
Grok 4.3 has been available since April 30, 2026.
Who makes Grok 4.3?
Grok 4.3 is made by xAI.
What comes after Grok 4.3?
Grok Build 0.1, released on May 19, 2026.