Grok Build is Now Open Source

tech

Grok Build is Now Open Source

Explore the harness behind our coding agent and TUI.

TL;DR

Grok Build, SpaceXAI's coding agent and TUI, is now open-source on GitHub.
The source code allows for direct understanding of its operation, from context assembly to tool dispatch.
Open-sourcing facilitates easier exploration and extension for users working with skills, plugins, hooks, MCP servers, and subagents.
Grok Build can now run fully local-first, with users compiling and pointing it to their own local inference.
The published source includes the agent loop, tools for code manipulation and command execution, the terminal UI, and the extension system.

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Elon Musk reposted

X Freeze

Grok just leveled up again

Two major new connectors have been added:

• Stripe → payments, customers and invoices

• Calendly → availability, scheduling and meetings

Grok can now help manage both the money coming into a business and the time behind it

It is quickly becoming an operating layer for the entire workflow

Elon Musk reposted

Grok

Try Grok 4.5 for free, an all new Opus-class model that is fast and low cost. Great for real-world coding and engineering tasks.

Elon Musk reposted

Grok

Grok 4.5 is built for real-world engineering. It excels in large codebases and handles long-running tasks that span multiple repositories, hundreds of skills, and a variety of tools.

SpaceXAI

We've open-sourced Grok Build and have reset usage limits for all users.

Open sourcing Grok Build allows anyone to support making a reliable and robust harness. Check out our code, including the Git repo for the Grok Build CLI.

https://t.co/3SSvPu2Nrz

SpaceXAI

Replying to @SpaceXAI

In response to user questions about privacy: Since launch, Grok Build has fully respected zero data retention (ZDR). All users have always had the ability to disable data upload in the CLI.

When data upload was disabled, this choice was respected. In the early beta, data

Elon Musk

Grok Build is now open source

SpaceXAI

Grok 4.5 at #2 on Proximal's FrontierSWE benchmark across implementation and performance, and #1 on research abilities

Elon Musk reposted

Grok

Usage limits are reset and Grok Build is open-source

Elon Musk reposted

Jason Ginsberg

We've appreciated your feedback on X. Limits are reset, Grok 4.5 is available in the EU, and Grok Build is now open source.

Elon Musk reposted

X Freeze

Grok Build is now fully open source, and SpaceXAI has made its privacy-first approach even stronger

SpaceXAI has officially:

• Open-sourced the Grok Build harness CLI

• Reset usage limits for all users

• Disabled data retention by default

• Deleted all previously retained coding data

• Made the harness fully local-first, allowing you to run it with your own inference

Since launch, Grok Build has supported Zero Data Retention (ZDR) for users who opted in

Now, based on community feedback, SpaceXAI has gone a step further: Data retention is now OFF by default for everyone

Your coding sessions remain private by default, with retention entirely under your control

By combining an open-source harness, local-first execution, zero retention by default, and the deletion of previously retained coding data, SpaceXAI is setting a new standard for privacy in AI coding tools

Transparent, open, and built to give users complete control over their data

Elon Musk reposted

Matthew Berman

I know I'm late but yeah ok Grok 4.5 is actually really good.

It's super fast, direct path to solutions, and quite capable.

Elon Musk reposted

stevenmarkryan

I swear, Grok Build adds about 60 points to my IQ which means I can experience what it's like to have an IQ in the top half of all humans while I'm using it.