xAI: Grok 4 Fast
Fast Grok model for responsive chat, reasoning, and tool-assisted work
Cheapest input
$0.2
$/MTok · models.dev
Cheapest output
$0.5
$/MTok
Context
2M
tokens
Offers
4
2 sources
Offers
Same model, different listings. First-party, router, and aggregator rows stay separate so you can see the spread instead of a single blended number.
| Source | Provider | Input | Output | Cache read | Context |
|---|---|---|---|---|---|
| models.devcheapestxai/grok-4-fast | Requesty | $0.2 | $0.5 | $0.05 | 2M |
| models.devx-ai/grok-4-fast | ZenMux | $0.2 | $0.5 | $0.05 | 2M |
| LiteLLMoci/xai.grok-4-fast | — | $5 | $25 | $0.5 | — |
| LiteLLMxai.grok-4-fast | — | $5 | $25 | $0.5 | — |
Capabilities
- Reasoning
- Tool calling
- Attachments
- In: text
- In: image
- Out: text
Knowledge cutoff: 2025-01Released: 2025-09-19Family: grok