When was Grok 4.3 released?

xAI released Grok 4.3 on 30 Apr 2026. It is available through the Opper gateway.

Does Grok 4.3 support zero data retention?

Yes. Grok 4.3 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 4.3 hosted?

See the per-route table for Grok 4.3 hosting locations and residency details.

Is Grok 4.3 trained on prompts and outputs?

No. Every hosting route for Grok 4.3 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Grok 4.3?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Grok 4.3. Contact hello@opper.ai to receive it.

Grok 4.3

by xAI

Released 13 days after Grok TTS · All xAI releases

Grok 4.3 is xAI's reasoning flagship released April 2026, unifying reasoning, vision, and tool use into a single production model across a 1 million token context window. Reasoning is on by default for every request, with configurable effort levels so you can dial in the reasoning depth appropriate for each task. Native vision input enables multimodal analysis across text and images, while agentic support includes tool calling, structured outputs, and web search. The model targets reasoning-heavy workloads such as mathematical problem solving, code analysis, multi-step planning, and tasks where structured thinking improves answer quality. With an April 2026 release and a December 2025 knowledge cutoff, Grok 4.3 is xAI's answer to production-scale reasoning, balancing accuracy, latency, and the long context that modern agentic systems demand.

Call Grok 4.3 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

Max output

—

Input price

$1.25 /1M$0.20 cache read

Output price

$2.50 /1M

Released

30 Apr 2026

Web search

Native

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

Available routes

Grok 4.3 runs on 5 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	Training	Input	Output	Cache read
Azure	Multi	No	$1.25	$2.50	$0.20	Not offered on this route
xAI	Multi	No	$1.25	$2.50	$0.20
xAI	Multi	No	$1.25	$2.50	$0.20
xAI	Multi	No	$1.25	$2.50	$0.20
xAI	Multi	No	$1.25	$2.50	$0.20

Live routes and prices as JSON: api.opper.ai/v3/models?q=grok-4.3

Uptime and availability

Grok 4.3 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 99.19% over the same window.

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

2 monitored providers serve Grok 4.3.

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

Azure — Multi-region

Zero data retention with abuse monitoring: nothing is logged or used for training; content flagged by abuse monitoring is held for review. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: With abuse monitoring, flagged content held.
Training: No training on customer data.
Logging: None
Abuse monitoring: On by default, holds flagged content, a person can view samples
GDPR DPA: DPA available
Transfer mechanism: SCCs

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: 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

xAI — Multi-region

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

Best for

Where Grok 4.3 ranks among the models on Opper with a score for each use case.

Agents0.7

Terminal-Bench 4.0 and AutomationBenchSee the Agents ranking →

Benchmarks

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

Global rank#120 of 508 LLMs

TierEfficient

Output speed83 tok/s

Intelligence Index (previous version)24.9

Coding

Terminal-Bench 4.0

SciCode

48%

Agentic & knowledge work

AutomationBench

GDPval

22%

GDP.pdf

Briefcase (Elo)763

Terminal-Bench Hard

38%

τ²-Bench Telecom

98%

Science & reasoning

Humanity's Last Exam

37%

GPQA Diamond

90%

Long-context reasoning

75%

Knowledge

MMMU-Pro

78%

Math & instruction following

IFBench

83%

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

Get started

Call Grok 4.3 through the Opper gateway with one API key. Opper is drop-in compatible with the OpenAI, Anthropic and Google AI SDKs.

Grok 4.3 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-4.3",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);