AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

AI Model Release Tracker

xAI – AI Models

Release cadence

Days since last release
17 Apr 2026
62
Average
46
Recent releases
17 Apr 2026 · Grok 4.3 Beta
59
17 Feb 2026 · Grok 4.20 Beta
90
19 Nov 2025 · Grok 4.1 Fast
2
17 Nov 2025 · Grok 4.1
77
1 Sep 2025 · Grok 4 Fast
4
Expected next release
Overdue
Jun 2, 2026
16 days ago

Release Frequency (Per Month)

New xAI models shipped each calendar month.

22110Nov 23Mar 24Aug 24Feb 25Jul 25Aug 25Sep 25Nov 25Feb 26Apr 26

Releases by Year

Year-over-year xAI totals. 2026 is partial (through Jun 18).

20231
20242
20257
2026(YTD)2

All Releases

12 releases · Nov 3 2023 – Apr 17 2026

2026

2 releases
Grok 4.3 Beta
Apr 17
Grok 4.20 Beta
Feb 17

2025

7 releases
Grok 4.1 Fast
Nov 19
Grok 4.1
Nov 17
Grok 4 Fast
Sep 1
Grok Code Fast 1
Aug 28
Grok 2.5
Aug 1
Grok 4
Jul 9
Grok 3
Feb 17

2024

2 releases
Grok‑2
Aug 14
Grok‑1.5
Mar 29

2023

1 release
Grok‑1
Nov 3

Other Companies

OpenAI
Anthropic
Google
Meta
DeepSeek
Mistral
Moonshot AI
Cursor

About xAI

Elon Musk's AI company building the Grok series of models. Founded in 2023. AI Release Tracker has logged 12 xAI models, from Grok‑1 (Nov 3 2023) through Grok 4.3 Beta (Apr 17 2026). Every release below links to a dedicated page with benchmarks, parameters, and context window.