Grok is xAI’s closed-source model family, with weights for Grok 1 released under Apache 2.0 and later versions kept proprietary. Grok models are accessed through X and the xAI API.
See all models from xAIModels in family
16
Open weight
0
API only
16
Avg score
67.3
Top benchmark
99.2
MATH-500
Total HF downloads
—
Primary modality
Text
Context window
131K – 2.0M
First release
Aug 2024
Latest release
May 2026
Every release in the Grok family, ranked by composite score across benchmarks, popularity, efficiency, and versatility.
| # | Model | Modality | Score | Params | Released |
|---|---|---|---|---|---|
| 1 | Grok 4.1 (Thinking)API | text | SS88.4 | — | Nov 2025 |
| 2 | Grok 4.1API | text | SS88.1 | — | Nov 2025 |
| 3 | Grok 4.20 Beta1API | text | AA83.9 | — | Feb 2026 |
| 4 | Grok 4.20 Multi-Agent Beta 0309API | text | AA73.3 | — | Mar 2026 |
| 5 | Grok 3 Mini BetaAPI | text | AA70.5 | — | Mar 2025 |
| 6 | Grok 4.3 betaAPI | text | BB67.4 | 500B | Apr 2026 |
| 7 | Grok 4.3API | text | BB67.0 | — | Apr 2026 |
| 8 | Grok Imagine Video 1.5API | video | BB65.6 | — | May 2026 |
| 9 | Grok 4 (0709)API | text | BB63.3 | — | Jul 2025 |
| 10 | Grok 4.1 Fast ReasoningAPI | text | BB62.5 | — | Nov 2025 |
When a family spans multiple modalities, the strongest model in each one.
Text
Grok 4.1 (Thinking)
Video
Grok Imagine Video 1.5
How the family splits across text, image, video, audio, and embedding releases.
When each release shipped, newest first. Useful for tracking version cadence.
May 30
Apr 30
Apr 17
Mar 9
Mar 9
Feb 16
Nov 18
Nov 16
Nov 16
Sep 30
Sep 30
Jul 8
Mar 31
Mar 31
Feb 23
Aug 12
Composite grades across this family. Higher is better, blending benchmarks, popularity, and efficiency.
Closed-source releases accessed through xAI’s API.
| # | Model | Modality | Score | Params | Released |
|---|---|---|---|---|---|
| 1 | Grok 4.1 (Thinking)API | text | SS88.4 | — | Nov 2025 |
| 2 | Grok 4.1API | text | SS88.1 | — | Nov 2025 |
| 3 | Grok 4.20 Beta1API | text | AA83.9 | — | Feb 2026 |
| 4 | Grok 4.20 Multi-Agent Beta 0309API | text | AA73.3 | — | Mar 2026 |
| 5 | Grok 3 Mini BetaAPI | text | AA70.5 | — | Mar 2025 |
| 6 | Grok 4.3 betaAPI | text | BB67.4 | 500B | Apr 2026 |
| 7 | Grok 4.3API | text | BB67.0 | — | Apr 2026 |
| 8 | Grok Imagine Video 1.5API | video | BB65.6 | — | May 2026 |
| 9 | Grok 4 (0709)API | text | BB63.3 | — | Jul 2025 |
| 10 | Grok 4.1 Fast ReasoningAPI | text | BB62.5 | — | Nov 2025 |
| 11 | Grok 4 Fast ReasoningAPI | text | BB61.6 | — | Sep 2025 |
| 12 | Grok 2API | text | BB59.9 | — | Aug 2024 |
| 13 | Grok 3 Mini HighAPI | text | BB59.3 | — | Mar 2025 |
| 14 | Grok 4.20 Beta 0309 ReasoningAPI | text | BB58.0 | — | Mar 2026 |
| 15 | Grok 3 Preview 02-24API | text | CC53.8 | — | Feb 2025 |
| 16 | Grok 4 Fast ChatAPI | text | CC53.7 | — | Sep 2025 |
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