# Grok 4.5

> xAI Grok 4.5 — 旗舰推理模型,256K 上下文。

Canonical: https://routemux.com/zh/xai/grok-4.5
Provider: xAI

## Key facts

| Field | Value |
| --- | --- |
| Model ID | xai/grok-4.5 |
| Official model ID | grok-4.5 |
| Context window | 256K |
| Max output | 64K |
| Input modalities | text |
| Output modalities | text |
| Capabilities | Reasoning, Tool Calling, Coding, Cache |
| Availability | available |

## Pricing

- RouteMux input: $0.2 per 1M tokens
- RouteMux output: $0.6 per 1M tokens
- Official input: $2 per 1M tokens
- Official output: $6 per 1M tokens
- Cache read: $0.05 per 1M tokens
- Saving vs official: 90%
- Official price source: xai_x0.10, verified 2026-07-23

Billing is prepaid wallet, charged per successful request only.

## API access

Base URL: https://api.routemux.com

Supported protocols:

- openai_chat