Grok 4.20

xAI · 2026 · Reasoning LLM · USA

Overview

xAI flagship: public beta Feb 17, 2026, full release + API March 2026. Multi-agent architecture (4-agent standard; 16-agent Heavy variant), 2M-token context, real-time X data, weekly post-launch upgrade cadence. Successor to Grok 4.1.

Details

Vendor: xAI
Type: Reasoning LLM
Release year: 2026
Jurisdiction: USA
CEO: Elon Musk
Key staffers: Igor Babuschkin (Co-Founder), Tony Wu (Co-Founder), Greg Yang, Toby Pohlen
Deployment: Cloud only (proprietary)
Open source: No
Free tier: Yes
Subscription: X Premium+ / SuperGrok plans; API ~$2/M input (output pricing reports vary, ~$6-15/M)
Stock status: Private (acquired by SpaceX, 2026)
X: @xai

Capabilities

AppVoice Chat

AIDb Rating

8/5

AIDb v2.0 (curated): Capability 8.5/10 · Currency 8/10 · Access 5.5/10 · Significance 6/10 → 7.57

Safety notes

Use official system card/docs for model-specific risk details.

Last verified 2026-06-11 · Primary source ↗

Cite this

“Grok 4.20.” AIDb — The AI Database. Verified 2026-06-11. https://theaidatabase.com/m/xai-grok-4-20.html