Grok 4
Grok 4 is xAI's high-capability Grok 4 reasoning model. It uses chain-of-thought reasoning for mathematics, science, and coding workloads with a context window of 256K tokens.
ReasoningTool UseVision (Image)
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'xai/grok-4', prompt: 'Why is the sky blue?'})More models by xAI
| Model |
|---|
| 1M | 0.9s | 95tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — |  | 04/30/2026 | ||||
| 2M | 3.0s | 511tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — | | 03/11/2026 | ||||
| 2M | 0.5s | 155tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — |  | 03/09/2026 | ||||
| 2M | 0.4s | 79tps | $1.25/M | $2.50/M | Read: $0.2/M Write: — | $5/K + input costs | — | | 03/09/2026 | ||||
| 1M | 0.3s | 68tps | $0.20/M | $0.50/M | Read:$0.05/M Write:— | — | — | | 07/09/2025 | ||||
| 1M | 7.6s | 137tps | $0.20/M | $0.50/M | Read:$0.05/M Write:— | — | — | | 07/09/2025 |