Grok 4 Fast

xAI · 2025 · Multimodal LLM · USA

Open in the interactive archive →

Overview

Always-on reasoning. Top LMArena rankings. DeepSearch. 2M context window. July 2025.

Details

Vendor

xAI

Type

Multimodal LLM

Release year

2025

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

Grok via X Premium+: starts $40/mo (web) + optional SuperGrok tiers

Stock status

Private

X

@xai

Capabilities

AppVoice Chat

AIDb Rating

6/5

AIDb v2.0 (curated): Capability 6.5/10 · Currency 5/10 · Access 7/10 · Significance 6/10 → 6.20

Last verified 2026-06-11 · Primary source ↗

Cite this

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

More from xAI

Aurora (xAI) · Grok-1 (open) · Grok 1 · Grok 3 · Grok 4 · Grok Aurora