Grok Build 0.1

by xAI

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.

Key info

Input
Output
Features
Context window
256K
Max output
β€”
Input price
$1.00 /1M
Output price
$2.00 /1M
  • US residency available
  • Zero data retention via Enterprise
  • No training by default
  • GDPR DPA available

Available routes

Grok Build 0.1 runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance β€” full data-handling detail per route below.

ProviderRegionZero data retentionTrainingInputOutput
USEnterpriseNo$1.00$2.00

Training posture across routes: No training on prompts by default.

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 β€” United StatesπŸ‡ΊπŸ‡Έ

Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.

Zero data retention
Available via Opper Enterprise contract.
Training
No training on customer data.
Logging
Abuse monitoring (30-day retention)
Third-party access
None disclosed
GDPR DPA
DPA available
Transfer mechanism
SCCs

Benchmarks

Independent benchmark scores β€” composite indices for reasoning, coding, and math, plus individual eval scores where available.

Global rank#35 of 534 LLMs
TierStrong
Output speed71 tok/s
First token0.40s
Intelligence Index39.8
Coding Index51.5
Reasoning & knowledge
GPQA Diamond
90%
Humanity's Last Exam
36%
Long-context reasoning
65%
Coding
SciCode
50%

Get started

Call Grok Build 0.1 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β€” Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into your coding agent β€” Claude Code, Cursor, Codex, and more β€” and it'll wire up Opper for you.

Or call it directly

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.click/v3/compat",
});
const completion = await client.chat.completions.create({
model: "xai/grok-build-0.1",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

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Side-by-side on privacy, EU hosting, pricing, and benchmarks.

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Grok Build 0.1 by xAI β€” pricing, benchmarks | Opper AI