GROK 4 5 versions
By xAI
| Model | Released | Type | Arch | Params (B) | Context | Open | Status |
|---|---|---|---|---|---|---|---|
| Grok-4 | Jul 9, 2025 | Multimodal | MoE | 1,700 | 256K | Closed | Active |
| Grok 4 Fast | Jul 24, 2025 | Multimodal | MoE | 1,700 | 2M | Closed | Active |
| Grok 4.1 Fast | Sep 8, 2025 | Multimodal | Unknown | Not disclosed | 2M | Closed | Active |
| Grok 4.1 | Oct 16, 2025 | Text LLM | Unknown | Not disclosed | 2M | Closed | Active |
| Grok 4.5 | Jul 25, 2026 | Multimodal | Unknown | Not disclosed | Not disclosed | Closed | Active |