Grok 4.3
Grok 4.3 is a xAI reasoning model with an improved architecture and a December 2025 knowledge cutoff, matching the scale of Grok 4.20 within a context window of 1M tokens.
ReasoningTool UseImplicit CachingFile InputVision (Image)Web Search
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'xai/grok-4.3', prompt: 'Why is the sky blue?'})More models by xAI
| Model |
|---|
| 256K | 0.3s | 203tps | $1.00/M | $2.00/M | Read: $0.2/M Write: — | $5/K + input costs | — |  | 05/20/2026 | ||||
| 2M | 0.5s | 129tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — | | 03/11/2026 | ||||
| 2M | 0.6s | 94tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — |  | 03/09/2026 | ||||
| 2M | 2.9s | 869tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — | | 03/09/2026 | ||||
| 1M | 2.9s | 214tps | $0.20/M | $0.50/M | Read:$0.05/M Write:— | — | — | | 07/09/2025 | ||||
| 1M | 0.3s | 63tps | $0.20/M | $0.50/M | Read:$0.05/M Write:— | — | — | | 07/09/2025 |