xAI Grok
xAI
xAI's Grok 4.3 is now live on the xAI API. xAI recommends grok-4.3 for chat and coding and describes it as the most intelligent and fastest model the company has built.
Last updated: May 11, 2026
4.3
Current API Model
grok-4.3
Model ID
Tools
Web, X, Code, Files
$1.25 / $2.50
Input / Output per 1M
Available Models
| Model | Input $/1M | Output $/1M | Context | Best For |
|---|---|---|---|---|
| Grok 4.3 (recommended) | $1.25 | $2.50 | 1M | Chat, coding, instruction following, tool use |
| Grok Imagine API | Image and video pricing is listed separately by xAI. | Image and video generation | ||
| Grok Voice API | Realtime, text-to-speech, and speech-to-text pricing is separate. | Voice agents, TTS, STT | ||
| Legacy Grok models | Availability varies by account and endpoint. | Existing integrations that have not migrated yet | ||
Consumer Plans
| Plan | Price | Includes |
|---|---|---|
| Grok.com | Consumer billing | Full-featured web AI assistant |
| Mobile apps | Consumer billing | iOS and Android AI assistant access |
| Grok in X | X billing | X-integrated Grok experience |
| xAI API | xAI billing | Programmatic access through api.x.ai |
Strengths & Weaknesses
Strengths
- Current recommended model for xAI API chat and coding
- xAI describes it as its most intelligent and fastest model to date
- Server-side Web Search and X Search tools for real-time workflows
- Code execution, file search, collections search, and remote MCP tool support
- Cost tracking is exposed through API usage fields
Weaknesses
- Higher context requests and server-side tools can add separate costs
- Consumer Grok subscriptions and xAI API billing are separate
- Search and other server-side tools add separate usage costs
Best For
- Chat and coding through the xAI API
- Instruction-following workflows and agentic tool use
- Real-time information synthesis with Web Search or X Search enabled
- Applications that need OpenAI-compatible chat completions or Responses API patterns
- Teams that want cost tracking surfaced directly in API usage objects
Latest Release NEW
Grok 4.3 — May 2026
- Live on the xAI API as
grok-4.3 - xAI's recommended model for chat and coding
- Supports Responses API and Chat Completions usage patterns
- Works with server-side Web Search, X Search, code execution, file search, and remote MCP tools
- Request costs can be tracked through
cost_in_usd_ticksusage fields
Previous Releases
Grok 4.20 Beta — Early 2026
- Initial beta with multi-agent reasoning architecture
- Introduced step-back reasoning for complex problem solving
- Integrated with X platform for real-time information access
Grok 3 — December 2024
- First Grok model trained on Colossus supercluster
- Major improvements in math, coding, and reasoning
- Set the foundation for the 4.x multi-agent architecture