Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Details
| Field | Value |
|---|---|
| id | x-ai/grok-4.5 |
| family | grok |
| modality | text+image+pdf->text |
| context_length | 500000 |
| max_output_tokens | 500000 |
| release_date | 2026-07-08 |
| is_open_weights | no |
| supports_tool_call | yes |
| supports_reasoning | yes |
| supports_structured_output | yes |
| supports_attachment | yes |
| input_modalities | text, image, pdf |
| output_modalities | text |