Model vendor
xAI
Elon Musk AI company
Updated Aug 10, 2026. Data as of 2026-08-07
Published models23
Published versions25
Open defaults0
CountryUS
xAI models
Default-version specifications and scored-version capability values are labeled separately.
| XA | Grok 4 Fast | 66.2 | 100.0% | 2M | Closed weights | Grok 4 Fast | |
| XA | Grok-1.5 | 19.3 | 80.0% | N/A | Closed weights | Grok-1.5 | |
| XA | Grok-1.5V | N/A | N/A | N/A | Closed weights | Not scored | |
| XA | Grok-2 | N/A | N/A | 128K | Closed weights | Not scored | |
| XA | Grok-2 Image 1212 | N/A | N/A | 131.1K | Closed weights | Not scored | |
| XA | Grok-2 mini | N/A | N/A | N/A | Closed weights | Not scored | |
| XA | Grok-3 | N/A | N/A | 128K | Closed weights | Not scored | |
| XA | Grok-3 Mini | N/A | N/A | 128K | Closed weights | Not scored | |
| XA | Grok-4 | N/A | N/A | 256K | Closed weights | Not scored | |
| XA | Grok-4 Fast Non-Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4 Fast Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4 Heavy | N/A | N/A | N/A | Closed weights | N/A | Not scored |
| XA | Grok-4.1 | N/A | N/A | 256K | Closed weights | Not scored | |
| XA | Grok-4.1 Fast Non-Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4.1 Fast Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4.1 Thinking | N/A | N/A | 256K | Closed weights | Not scored | |
| XA | Grok-4.20 Beta Non-Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4.20 Beta Reasoning | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok-4.20 Multi-Agent Beta | N/A | N/A | 2M | Closed weights | Not scored | |
| XA | Grok 4.3 | N/A | N/A | 1M | Closed weights | Not scored | |
| XA | Grok 4.5 | N/A | N/A | 500K | Closed weights | Not scored | |
| XA | Grok Build 0.1 | N/A | N/A | 256K | Closed weights | Not scored | |
| XA | Grok Code Fast 1 | N/A | N/A | 256K | Closed weights | Not scored |
xAI capability scores
Each unique model uses its latest scored version.
xAI highlights
Leaders from this vendor's current published catalog.
Top scoreGrok 4 Fast66.2 LLMBoardLargest contextGrok 4 Fast2M tokens
Open-weight defaults0of 23 published models
What is xAI?
Vendor context from the published model registry.
Elon Musk AI company
Model ownership is separate from API hosting. One model can be offered by multiple API providers with different prices.
- Vendor
- xAI
- Published models
- 23
- Published versions
- 25
- Country
- US
- Founded
- Not published
Vendor description and inventory come from the published model registry.
FAQ
Common questions about xAI.
What is xAI's highest-ranked model?
Grok 4 Fast currently has the strongest published LLMBoard score from this vendor.
How many xAI models are tracked?
The current public catalog contains 23 independently selectable xAI model products and 25 published versions.
Does xAI host every listed model API?
Not necessarily. Vendor identifies the model developer; API providers are tracked separately.
Does xAI publish open-weight models?
No current default version is marked as open weight.