xAI: Grok 4 vs xAI: Grok 4.1 Fast
Side-by-side model comparison based on OpenRouter API data.
| Spec | xAI: Grok 4 | xAI: Grok 4.1 Fast |
|---|---|---|
| Provider | xAI | xAI |
| Context Length | 256K | 2M |
| Max Output | N/A | 30K |
| Input Price/1M | $3.00 | $0.20 |
| Output Price/1M | $15 | $0.50 |
| Cache Read/1M | $0.75 | $0.05 |
| Cache Write/1M | Free | Free |
| Input Modalities | Image + Text | Text + Image |
| Output Modalities | Text | Text |
| Tokenizer | Grok | Grok |
| Moderated | No | No |