Does Grok 4.20 Reasoning support zero data retention?

Yes. Grok 4.20 Reasoning 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 4.20 Reasoning hosted?

Grok 4.20 Reasoning runs on both EU and US hosting routes through the Opper gateway. Pick the route that matches your residency requirement.

Is Grok 4.20 Reasoning trained on prompts and outputs?

No. Every hosting route for Grok 4.20 Reasoning is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Grok 4.20 Reasoning?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Grok 4.20 Reasoning. Contact hello@opper.ai to receive it.

Grok 4.20 Reasoning

by xAI

Grok 4.20 Reasoning is the reasoning-enabled production model of xAI's March 2026 Grok 4.20 generation, generating explicit chain-of-thought before responding to improve accuracy on complex logic, math, and multi-step problems. It spans a 2 million token context window, making it strong for long-horizon agentic workflows and research. The model integrates real-time X data when context is needed, supports native tool calling for external API invocation, and handles image input alongside text. Visible reasoning steps support transparency and debugging across multi-turn conversations. Released in March 2026, Grok 4.20 Reasoning targets accuracy-critical applications such as analysis, complex code generation, and structured reasoning where you need both explanations and the long context that extended tasks demand.

Call Grok 4.20 Reasoning on Opper with the OpenAI SDK. Sign up without a credit card. Get started

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

Max output

30K

Input price

$2.00 /1M$0.20 cache read

Output price

$6.00 /1M

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

Available routes

Grok 4.20 Reasoning runs on 4 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.

Provider	Region	Training	Input	Output	Cache read
Google Cloud	Multi	No	$2.00	$6.00	$0.20
xAI	US	No	$2.00	$6.00	$0.20
xAI	US	No	$2.00	$6.00	$0.20
xAI	EU	No	$2.00	$6.00	$0.20

Uptime and availability

Grok 4.20 Reasoning runs on 2 independently monitored routes through the Opper gateway. A direct integration leaves you on one of them, the gateway serves whichever is healthy.

100%effective uptime, last 30 days

Averaged across these routes on their own, a single provider reached 99.27% over the same window.

Daily status through the gateway, which serves each request from whichever route is healthy.

2 monitored providers serve Grok 4.20 Reasoning.

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 4.20 Reasoning has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

Google Cloud — Multi-region

Zero data retention with abuse monitoring: prompts and outputs are kept for abuse monitoring only, for a window the provider does not state, and are not used for training. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, window not stated.
Training: No training on customer data.
Logging: Abuse monitoring
Abuse monitoring: On by default, holds flagged content, 90 days, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

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

xAI — Ireland🇮🇪

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. EU; 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: Not applicable — data stays in EU

Get started

Call Grok 4.20 Reasoning through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Grok 4.20 Reasoning 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: "grok-4.20-reasoning",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);