Grok 4.3
xAI
xai/grok-4.3
Flagship reasoning, 1M context
Context Window
1.0M
1,000,000 tokens
Max Output
128K
128,000 tokens
About this model
Grok 4.3 is xAI's recommended model for chat, coding, and tool-calling workflows that need strong intelligence and reliable reasoning.
Compared with the retiring Grok 4 / 4.1 Fast series, Grok 4.3 is the safer long-term migration target.
Highlights
1M context
Agentic reasoning
Tool calling
Coding ability
Best For
Complex Q&ACode generationTool-using agentsKnowledge work
2026-05-06
Capabilities
ChatVisionReasoningCodetools
Pricing (per 1M tokens)
| Pricing (per 1M tokens) | / 1M tokens |
|---|---|
| Input / 1M | $1.31 |
| Output / 1M | $2.63 |
Final prices shown
Quick Start
main.py
from openai import OpenAI client = OpenAI( base_url="https://api.chuizi.ai/v1", api_key="ck-your-key-here", ) response = client.chat.completions.create( model="xai/grok-4.3", messages=[{"role": "user", "content": "Hello!"}], ) print(response.choices[0].message.content)