Grok 3

Shut downxAIxai/grok-32 platforms

What breaks Add its dates to my calendar

Redirected. Grok 3 is shut down on 2 platforms, with no shutdown date announced. xAI names Grok 4 as the replacement.

Next shutdown: None setNo date on 2 platforms
Released: Feb 19, 2025xAI

Dates on every platform

2 listings · a floor is the earliest possible date

Grok 3 on each platform: model ID, status, dates, replacement and source
Platform	Model ID and status	Deprecated	Shuts down	Replacement
Azure AI FoundryMicrosoft: Model retirement schedule - Microsoft Foundry (opens in a new tab) · checked Oct 14, 2026	`grok-3:1`Shut down	–	May 1, 2026Shut down	Grok 4
xAI APIxAI: Grok Model Retirement on May 15, 2026 (opens in a new tab) · checked Oct 14, 2026	`grok-3`Shut down	–	May 15, 2026Shut down	Grok 4.3

Requests to retired deployments return 410 Gone.

Since the retirement, requests to grok-3 are served by grok-4.3 with reasoning effort set to none and billed at grok-4.3 rates.

Since May 15, 2026, requests to grok-3 on xAI API are answered by Grok 4.3, with no error. Behavior and price follow the newer model.

What breaks when you move off Grok 3

Pricing
Requests to the retired slugs are billed at grok-4.3 rates, not the rates of the original model.
Grok 4.1 Fast (Reasoning), Grok 4.1 Fast (Non-Reasoning), Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning), Grok 4, Grok 3 to Grok 4.3 · xAI API · May 15, 2026
Defaults
Reasoning slugs are served with low reasoning effort and non-reasoning slugs with none; set medium or high explicitly for deeper reasoning.
Grok 4.1 Fast (Reasoning), Grok 4.1 Fast (Non-Reasoning), Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning), Grok 4, Grok 3 to Grok 4.3 · xAI API · May 15, 2026
Parameters
grok-4.20 and newer models silently ignore logprobs and top_logprobs.
Grok 4.1 Fast (Reasoning), Grok 4.1 Fast (Non-Reasoning), Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning), Grok 4, Grok 3 to Grok 4.3 · xAI API · May 15, 2026
Availability
Inference requests to retired deployments return 410 Gone.
Grok 3, Grok 3 Mini, Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning) · Azure AI Foundry · May 1, 2026

Change history

May 15, 2026RedirectSix Grok models retired on the xAI API and redirected to Grok 4.3xAI API3 breaks

xAI retired grok-4-1-fast-reasoning, grok-4-1-fast-non-reasoning, grok-4-fast-reasoning, grok-4-fast-non-reasoning, grok-4-0709 and grok-3. The slugs still resolve: requests are served by grok-4.3 instead of returning an error.

Platform: xAI API
Models: Grok 4.1 Fast (Reasoning), Grok 4.1 Fast (Non-Reasoning), Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning), Grok 4, Grok 3
Replacement: Grok 4.3

PricingRequests to the retired slugs are billed at grok-4.3 rates, not the rates of the original model.
DefaultsReasoning slugs are served with low reasoning effort and non-reasoning slugs with none; set medium or high explicitly for deeper reasoning.
Parametersgrok-4.20 and newer models silently ignore logprobs and top_logprobs.

Source: xAI, Grok Model Retirement on May 15, 2026 (opens in a new tab); xAI, Models (opens in a new tab)

May 1, 2026ShutdownGrok 3, Grok 3 mini and Grok 4 Fast retired on Azure AI FoundryAzure AI Foundry1 break

Microsoft retired grok-3, grok-3-mini, grok-4-fast-reasoning and grok-4-fast-non-reasoning. It lists grok-4 and the Grok 4.1 Fast models as replacements.

Platform: Azure AI Foundry
Models: Grok 3, Grok 3 Mini, Grok 4 Fast (Reasoning), Grok 4 Fast (Non-Reasoning)

AvailabilityInference requests to retired deployments return 410 Gone.

Source: Microsoft, Model retirement schedule - Microsoft Foundry (opens in a new tab); Microsoft, Microsoft Foundry Models lifecycle and support policy (opens in a new tab)