Grok Build 0.1

Key facts

Where Grok Build 0.1 sits in our data

• Released May 19, 2026 (week 21 of 2026), in May 2026. Other models in our data released that month: Claude Opus 4.8, Nano Banana Pro, Command A+, Gemini 3.1 Flash-Lite.
• The previous xAI model we track is Grok 4.20 (Mar 10, 2026), 70 days earlier.
• Of the 60 models in our data with a published context window, Grok Build 0.1 has the number 47 largest (256K tokens). Our data is not every model on the market.
• All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding.

How Grok Build 0.1 differs from Grok 4.5

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

• Listed price is $1 in and $2 out, against $2 in and $6 out for Grok 4.5 (per 1M tokens).
• Context window is 256K tokens against 500K for Grok 4.5.
• Both accept text, image as input.
• Status is limited access, against generally available.
• Grok Build 0.1 came out 50 days before Grok 4.5.
• Facts for the other model: Grok 4.5.

What we tested

Nothing yet. We have not run Grok Build 0.1 ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Not verified, left out

We could not confirm these on a vendor page, so we do not state them.

• The release notes describe the model as "currently in early access".

Sources

• xAI release notes
• xAI models and pricing

More from xAI

• Grok 4.5 (Jul 8, 2026)
• Grok 4.20 (Mar 10, 2026)
• Grok 4.6 (Aug 12, 2026)
• Grok Voice Transcribe 2.0 (Sep 17, 2026)
• Grok 4.7 (Sep 21, 2026)
• Grok Voice 3.0 (Oct 14, 2026)

All 88 models