Grok 3 Mini Beta

by xAI

Grok 3 Mini Beta is an early-stage variant of xAI's Grok 3 Mini reasoning model, offering the same visible reasoning tokens in a beta form. It supports adjustable reasoning effort for tuning depth, structured data generation, external tool integration, and step-by-step reasoning across a 131k token context window. The model targets cost-conscious agentic systems that want reasoning transparency without the overhead of larger models. The beta designation reflects that xAI was still refining its lightweight reasoning approach based on real-world usage. It gives early adopters access to the same core advantages as the released model: inspectable thinking tokens, adjustable reasoning effort, and agentic capabilities through tool calling and function specification.

Call Grok 3 Mini Beta on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Key info

Input
Output
Features
Context window
131K
Max output
16K
Input price
$0.30 /1M$0.07 cache read
Output price
$0.50 /1M
  • US residency available
  • Zero data retention on pay-as-you-go
  • No training by default
  • GDPR DPA available

Available routes

Grok 3 Mini Beta 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.

ProviderRegionZero data retentionTrainingInputOutputCache read
USNo$0.30$0.50$0.07
USNo$0.30$0.50$0.07

Uptime and availability

Grok 3 Mini Beta runs on a single route through the Opper gateway today, so its availability is that provider's availability.

99.13%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 3 Mini Beta has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

xAI — United States🇺🇸

Zero data retention: nothing is logged, held for abuse monitoring or used for training. No training on customer data. US; 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 — United States🇺🇸

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. US; 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

Get started

Call Grok 3 Mini Beta through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Grok 3 Mini Beta 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

import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPPER_API_KEY,
baseURL: "https://api.opper.ai/v3/compat",
});
const completion = await client.chat.completions.create({
model: "xai/grok-3-mini-beta",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Use Grok 3 Mini Beta in your apps

Pick your tool to see how to run it on Grok 3 Mini Beta through Opper.

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