When was Grok Build 0.1 released?

xAI released Grok Build 0.1 on 29 May 2026. It is available through the Opper gateway.

Does Grok Build 0.1 support zero data retention?

Yes. Grok Build 0.1 is available with zero data retention on xAI through the Opper gateway. Other routes carry zero data retention with abuse monitoring; see each route's window in the data-handling section.

Where is Grok Build 0.1 hosted?

See the per-route table for Grok Build 0.1 hosting locations and residency details.

Is Grok Build 0.1 trained on prompts and outputs?

No. Every hosting route for Grok Build 0.1 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Grok Build 0.1?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Grok Build 0.1. Contact hello@opper.ai to receive it.

Grok Build 0.1

by xAI

Released 29 days after Grok 4.3 · Announcement · All xAI releases

Grok Build 0.1 is xAI's coding model released in May 2026, trained to act as an autonomous software engineering agent rather than a passive code-completion helper. It powers xAI's Grok Build CLI and is built for refactoring large codebases, multi-step development workflows, invoking tools, generating structured output, and running in loops until tasks complete. The model accepts text and image input across a 256k token context window, with function calling, structured outputs, and always-on reasoning that thinks through problems before responding. Unlike general-purpose chat models, it is optimized for interactive coding agents and long-horizon development tasks where an autonomous system must make decisions and drive progress across multiple tool invocations. Served at fast inference speeds and available in public beta through the xAI API, Grok Build 0.1 is designed to embed agentic coding directly into developer workflows for high-throughput, autonomous software engineering.

Call Grok Build 0.1 on Opper with the OpenAI SDK. Sign up without a credit card. Get started

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Key info

Input

Output

Features

Context window

256K

Max output

—

Input price

$1.00 /1M$0.20 cache read

Output price

$2.00 /1M

Released

29 May 2026

Web search

Native

Zero data retention on pay-as-you-go
No training by default
GDPR DPA available

Available routes

Grok Build 0.1 runs on 2 different routes through the Opper gateway. Compare residency, zero data retention and training posture at a glance, with full data-handling detail per route below. Some routes also sell priority processing: the same model at another price, picked per request with service_tier. How service tiers work.

Provider	Region	Zero data retention	Training	Input	Output	Cache read
xAI	Multi		No	$1.00	$2.00	$0.20
xAI	Multi		No	$1.00	$2.00	$0.20

Live routes and prices as JSON: api.opper.ai/v3/models?q=xai%2Fgrok-build-0.1

Uptime and availability

Grok Build 0.1 runs on a single route through the Opper gateway today, so its availability is that provider's availability.

98.33%route uptime, last 30 days

Single route, no failover target within this model.

Name a second model in the same request and the gateway tries it on retriable errors, so a busy hour never has to reach your users. Set up a fallback chain.

Measured over the last 30 days from each provider's official status feed via StatusGator. Refreshed hourly. See uptime for every provider Opper monitors.

Data handling per route

Each route hosting Grok Build 0.1 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

xAI — Multi-region

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: Yes. Nothing is logged, held for abuse monitoring or used for training.
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, keeps nothing
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

xAI — Multi-region

Zero data retention with abuse monitoring: prompts and outputs are kept for up to 30 days for abuse monitoring only, and are not used for training. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, 30-day window.
Training: No training on customer data.
Logging: Abuse monitoring (30-day retention)
Abuse monitoring: On by default, keeps nothing
Caching: Content cached for replay
GDPR DPA: DPA available
Transfer mechanism: SCCs

Benchmarks

Independent benchmark scores: the Intelligence Index and the individual evaluations behind it, grouped by skill.

Global rank#92 of 505 LLMs

TierEfficient

Output speed118 tok/s

Intelligence Index (previous version)27.2

Agentic & knowledge work

GDPval

29%

Science & reasoning

Humanity's Last Exam

38%

GPQA Diamond

90%

Long-context reasoning

75%

Knowledge

MMMU-Pro

77%

See full leaderboard →Benchmarks via Artificial Analysis · View on AA

Get started

Call Grok Build 0.1 through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Grok Build 0.1 is a premium model on Opper. Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "xai/grok-build-0.1",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);