What Is the Current Grok Version in April 2026?
Grok 4.20 Beta 2 is the current version as of April 2026. It is available on X Premium+ and SuperGrok.
- Version: Grok 4.20 Beta 2
- Release: March 3, 2026
- Access: X Premium+ / SuperGrok
Latest Grok Updates (April 2026)
- Grok 4.2 — improved reasoning and faster response times
- Voice Mode — now rolling out with real-time interaction
- Speed vs Quality Modes — users can control performance vs cost
- Access — limited to X Premium+ and SuperGrok tiers
What this means: Grok is evolving into a real-time AI assistant with better speed, control, and multimodal capabilities — competing directly with ChatGPT and Claude.
If you have searched for the current Grok version and found conflicting answers, you are not alone. xAI updates Grok frequently and runs multiple model variants simultaneously — each with different capabilities, context windows, and access tiers. This guide cuts through the confusion and tells you exactly what is available right now in April 2026.
The current flagship Grok model as of April 2026 is Grok 4.20 Beta 2, released March 3, 2026. It is the default model powering SuperGrok and X Premium+ subscriptions and is available via the xAI API. A separate model, Grok 4.1 Fast, is available through the enterprise API for developers who need faster, lower-cost inference.
Grok 4.20 Beta 2 — The Current Flagship
Grok 4.20 Beta 2 is not a single model — it is a multi-agent system where four specialized sub-agents work in parallel to produce cross-verified responses. This architecture is what separates it from earlier Grok versions and most competing models.
The 4-Agent Architecture Explained
The four agents are: Grok (coordinator), Harper (research), Benjamin (logic and math), and Lucas (contrarian analysis). When you submit a prompt, the coordinator routes subtasks to the appropriate agents, each processes independently, and results are cross-checked before a final response is delivered. This parallel verification is why Grok 4.20 claims the lowest hallucination rate on the market — errors that would slip through a single-model system get caught by the contrarian agent before reaching you.
Grok 4.20 Heavy — 16 Agents
SuperGrok Heavy subscribers get access to Grok 4.20 Heavy, which runs 16 specialized agents instead of four. It is designed for computationally intensive professional workloads — complex financial modeling, multi-domain research, advanced code generation — where depth matters more than speed. At $300 per month, it is priced for professional and enterprise use.
Key Specs
Grok 4.20 Beta 2 supports a 2,000,000 token context window in select API variants, making it one of the largest context windows available in any production model. It supports text, images, voice, and video input and output. API availability started March 10, 2026, with full integration into Auto, Fast, Expert, and Heavy user modes by mid-March.
Grok 4.1 — What Is It and Who Uses It?
Grok 4.1 is a separate model line optimized for speed and cost efficiency rather than maximum reasoning depth. Grok 4.1 Fast is available in the xAI Enterprise API and is the recommended model for developers building applications that need fast response times at scale. It supports agent tools, remote MCP servers, and the Files API. Pricing starts at $0.20 per million input tokens — significantly cheaper than the full Grok 4.20 flagship.
All Active Grok Models Compared
| Model | Access | Best For | Context Window |
|---|
| Grok 4.20 Beta 2 | SuperGrok, X Premium+, API | General use, research, reasoning | Up to 2M tokens (API) |
| Grok 4.20 Heavy | SuperGrok Heavy ($300/mo) | Complex professional workloads | 256K tokens |
| Grok 4.1 Fast | Enterprise API | Fast, cost-efficient app development | Standard |
| Grok 3 (legacy) | Free tier | Basic use, limited prompts | Standard |
Grok 5 — Release Date and What We Know
Grok 5 is xAI's next major model and the most anticipated AI release of 2026. As of April 2026, it has not been released. The original Q1 2026 window passed without a launch. The current consensus among observers points to Q2 2026 as the most likely release window.
Why Grok 5 Missed Q1 2026
xAI has not given an official explanation for the delay. The most likely reason is that training a 6 trillion parameter Mixture-of-Experts model on the Colossus 2 supercluster takes longer than projected timelines allow. Elon Musk confirmed in February 2026 that Colossus 2 is being upgraded to 1.5 gigawatts of power capacity in April — suggesting active infrastructure scaling is still underway.
Colossus 2 and the 6T Parameter Architecture
Grok 5 is being trained on Colossus 2, xAI's supercluster in Memphis, Tennessee, with 550,000 NVIDIA GB200 and GB300 GPUs and 2 gigawatts of total power capacity. The model uses a Mixture-of-Experts architecture with 6 trillion total parameters — the largest publicly announced AI model ever built. In a MoE architecture, only a fraction of parameters activate per query, keeping inference costs manageable despite the enormous total parameter count.
Expected Q2 2026 Timeline
xAI's own X account updated its projection in February 2026 to point at Q2 2026 as the most likely window. Based on the Colossus 2 infrastructure timeline and the pace of Grok 4.20 refinement releases, a late Q2 launch — May or June 2026 — is the most reasonable current estimate. No official date has been confirmed.
Which Grok Version Should You Use?
For most users: Grok 4.20 Beta 2 on SuperGrok at $30 per month is the right choice. It gives you the full multi-agent system, DeepSearch, voice mode, image and video generation, and the 128K context window. For developers building applications: Grok 4.1 Fast via the API offers the best cost-to-performance ratio. For heavy professional workloads: Grok 4.20 Heavy on SuperGrok Heavy at $300 per month is worth evaluating if you regularly run complex multi-step research or analysis tasks.
Frequently Asked Questions
What is the latest version of Grok in April 2026?
Grok 4.20 Beta 2, released March 3, 2026. It is the current flagship model available to SuperGrok and X Premium+ subscribers.
Is Grok 5 out yet?
No. As of April 2026, Grok 5 has not been released. xAI is targeting Q2 2026 but has not confirmed a specific date.
What is Grok 4.1?
Grok 4.1 Fast is a separate, speed-optimized model available through the xAI Enterprise API. It is not the same as Grok 4.20 and is designed for developers who need fast, affordable API access rather than maximum reasoning capability.
What is the difference between Grok and SuperGrok?
The free Grok tier gives access to the older Grok 3 model with strict usage limits. SuperGrok at $30 per month unlocks Grok 4.20, unlimited prompts, DeepSearch, voice mode, image and video generation, and a 128K context window. SuperGrok Heavy at $300 per month adds Grok 4.20 Heavy with 16 agents and a 256K context window.