Compare LLM Models
Side-by-side comparison of 1 model. Best values highlighted.
| Model ID | grok-4-fast |
| Status | deprecated |
| Knowledge cutoff | 2025-09-30 |
| Context window | 2M tokens |
| Max output | 30K tokens |
| Parameters | — |
| Open weights | No |
| Pricing (per MTok) | |
| Input | $0.20 |
| Output | $0.50 |
| Cache read | $0.050 |
| Cache write | — |
| Free tier | No |
| Capabilities | |
| Tool Use | |
| Streaming | |
| Prompt Caching | |
| Batch API | |
| Extended Thinking | |
| Structured Outputs | |
| Multi-turn Tool Calling | |
| Agentic Workload Ready | |
| Parallel Tool Calls | |
| Vision Input | |
| Audio Input | |
| Audio Output | |
| Modalities | |
| Input | text, vision, file |
| Output | text |
| Last updated | May 9, 2026 |