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xAI

xAI (also branded SpaceXAI) develops the Grok models. Its API offers Grok 4.x text models with up to 1M-token context plus Grok Imagine image and video and voice models; the Grok assistant runs on grok.com, iOS, Android and X.

Last verified

At a glance

API
Available
Consumer app
Yes
Website
x.ai
Public models
11

Models

ModelContextInputOutputAvailabilityVerified
Grok 4.20 (Non-Reasoning) 1,000,000 $1.25 per 1M tokens $2.50 per 1M tokens tiered Available 2026-10-25
Grok 4.20 (Reasoning) 1,000,000 $1.25 per 1M tokens $2.50 per 1M tokens tiered Available 2026-10-25
Grok 4.20 Multi-Agent (Beta) 1,000,000 $1.25 per 1M tokens $2.50 per 1M tokens tiered Preview 2026-10-25
Grok 4.3 1,000,000 $1.25 per 1M tokens $2.50 per 1M tokens tiered Available 2026-10-25
Grok 4.5 500,000 $2.00 per 1M tokens $6.00 per 1M tokens tiered Available 2026-10-25
Grok 4.6 500,000 $2.00 per 1M tokens $6.00 per 1M tokens tiered Available 2026-10-25
Grok 4.7 500,000 $2.00 per 1M tokens $6.00 per 1M tokens tiered Available 2026-10-25
Grok Build 0.1 256,000 $1.00 per 1M tokens $2.00 per 1M tokens tiered Preview 2026-10-25
Grok Imagine Image — — — Available 2026-10-25
Grok Imagine Image 2.0 — — — Available 2026-10-25
Grok Imagine Image Quality — — — Deprecated 2026-10-25

About xAI

xAI develops the Grok family of language models and the Grok Imagine image and video generation models. Its API offers Grok 4.x text models with context windows of up to 1M tokens, server-side tools such as web search and X search, and Batch API discounts on selected models. The Grok assistant is available on grok.com, in iOS and Android apps and on X, and Grok Build is its terminal-based coding agent. Official pages also use the names SpaceXAI and SpaceXSI; xAI's Grok 4.7 model card describes SpaceXAI as a doing-business-as name of XAI LLC.

Sources

  1. Grok Models & Pricing
  2. API Pricing
  3. Release Notes
  4. Introducing Grok 4.7
  5. Model Card: Grok 4.7 (Revision 2026-09-21)
  6. Bringing Grok 4.5 to iOS, Android, Web, and X
  7. Grok
  8. Image Generation
  9. Image Editing
  10. Multi-Image Editing
  11. Image Understanding
  12. Imagine Overview
  13. Web Search
  14. Tools Overview
  15. Rate Limits
  16. Regional Endpoints
  17. grok-imagine-image-quality Retirement on November 2, 2026
  18. May 15, 2026 Model Retirement
  19. Introducing Grok 4.6