Always-reasoning model with 1M context and configurable effort; replacement target for retired Grok 4.x Fast slugs.
Released
Apr 30, 2026
Context window
1M tokens
Max output
Not disclosed
Parameters
Not disclosed
Input price
$1.25 per 1M
Output price
$2.50 per 1M
Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.
Pricing
Launch priceApr 30, 2026
$1.25 in / $2.50 out
Current price
since Apr 30, 2026
$1.25 in / $2.50 out
Cached input $0.20 per 1M
Specifications
- Developer
- xAI
- Model type
- Multimodal
- Architecture
- Not disclosed
- Parameters
- Not disclosed
- Input
- Text Image
- Output
- Text
- Knowledge cutoff
- Dec 2025
- License
- Proprietary
- API access
- First-party API
- Capabilities
- Agentic Long context Reasoning Tool use