Grok 4 is xAI’s latest reasoning model, featuring a 256K context window with support for parallel tool calling, structured outputs, and multimodal inputs (text and images). Unlike some models, its reasoning process is not exposed, cannot be disabled, and does not allow users to specify reasoning depth. Pricing tiers adjust once a request exceeds 128K total tokens.
| Creator | xAI |
| Release Date | July, 2025 |
| License | Proprietary |
| Context Window | 256,000 |
| Image Input Support | Yes |
| Open Source (Weights) | No |
| Input Cost | $3/M tokens |
| Output Cost | $15/M tokens |
