xAI
Grok 4.3
x-ai/grok-4.3
Reasoning model that follows instructions closely, with a 1M context. endue’s default.
TextText, Images, Files → TextReady on endue
- Agentic work
- Reasoning
- Long documents
Overview
Good for
Written by endue
- Agentic work
- Reasoning
- Long documents
Not ideal for
From the model’s specs
Nothing in the specs rules out common agent work.
Capabilities
| Tool use | Supported |
|---|---|
| Structured output | Supported |
| JSON mode | Supported |
| Reasoning | Supported |
| Vision | Supported |
| Audio input | Not supported |
| Video input | Not supported |
| File input | Supported |
| Long context | Supported |
Specifications
- Model ID
x-ai/grok-4.3- Family
- Grok 4
- Context window
- 1M tokens
- Input
- Text, Images, Files
- Output
- Text
- Knowledge cutoff
- 2026-03
- Released
- 2026-05-01