Tool-calling model with 2M context launched with the Agent Tools API (grok-4-1-fast-reasoning / -non-reasoning).
Released
Nov 19, 2025
Context window
2M tokens
Max output
Not disclosed
Parameters
Not disclosed
Input price
Not disclosed
Output price
Not disclosed
Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.
Pricing
Launch priceNov 19, 2025
$0.20 in / $0.50 out
Current price
No longer sold
Specifications
- Developer
- xAI
- Model type
- Multimodal
- Architecture
- Not disclosed
- Parameters
- Not disclosed
- Input
- Text Image
- Output
- Text
- Knowledge cutoff
- Not disclosed
- License
- Proprietary
- API access
- First-party API
- End of life
- May 15, 2026
- Capabilities
- Agentic Long context Reasoning Tool use