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
14
Open weight
0
API only
14
Avg score
73.0
Top benchmark
93.2
Arena Score
Total HF downloads
—
Primary modality
Text
Context window
131K – 2.0M
First release
Aug 2024
Latest release
Apr 2026
Every release in the Grok family, ranked by composite score across benchmarks, popularity, efficiency, and versatility.
When each release shipped, newest first. Useful for tracking version cadence.
Apr 17
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 | text | SS86.1 | — | Nov 2025 | |
| 2 | Grok 4.1API | text | SS85.7 | — | Nov 2025 |
| 3 | text | AA78.7 | — | Feb 2026 | |
| 4 | text | AA74.7 | 500B | Apr 2026 | |
| 5 | text | AA73.0 | — | Nov 2025 | |
| 6 | text | AA72.7 | — | Sep 2025 | |
| 7 | text | AA71.8 | — | Sep 2025 | |
| 8 | text | AA70.3 | — | Jul 2025 | |
| 9 | Grok 2API | text | BB69.7 | — | Aug 2024 |
| 10 | text | BB69.3 | — | Feb 2025 | |
| 11 | text | BB67.9 | — | Mar 2026 | |
| 12 | text | BB67.5 | — | Mar 2026 | |
| 13 | text | BB67.4 | — | Mar 2025 | |
| 14 | text | BB67.0 | — | Mar 2025 |
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