AI model comparison
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Pick up to four models and compare the trade-offs that matter: context, price, API access, weights, inputs, outputs, and use cases.
| Attribute | Grok 4.5 xAI / SpaceXAI |
|---|---|
| Summary | xAI’s flagship reasoning model for coding, research, current-information workflows, and tool-using agents. |
| Best for | Current-event research, coding, agents, analysis using web and X data |
| Watch out for | Closed weights; quality can depend on search/tool configuration. |
| Family | Grok 4 |
| Type | Reasoning LLM |
| Status | GA |
| Released | 2026-07-08 |
| Context window | 1M |
| Max output | Not listed |
| Inputs | Text, image |
| Outputs | Text |
| Reasoning | Yes — low/medium/high |
| Tool calling | Yes — function, web, X, code |
| Structured output | Yes |
| API available | Yes |
| Open weights | No |
| Self-hostable | No |
| License | Proprietary |
| Price | $2 input / $6 output per 1M tokens |