Grok model evolution
Grok 1
Nov 2023
xAI's first model, initial release
Grok 1.5
Mar 2024
Improved capabilities, still not frontier competitive
Grok 2
Aug 2024
Significant upgrade, laying groundwork for Grok 3
Grok 3
Feb 2025
Breakthrough model with DeepSearch and Think mode. Competitive benchmarks.
Grok 4
Jul 2025
Integrated reasoning, multi agent Heavy variant
Grok 4.1
Nov 2025
Refined personality and usability. Preferred 64%+ of the time over Grok 4.
Grok 4.20 Beta
Mar 2026
Multi agent capabilities, expanded Batch API (image and video), Provisioned Throughput.
Grok 1
Nov 2023
xAI's first model, initial release
Grok 1.5
Mar 2024
Improved capabilities, still not frontier competitive
Grok 2
Aug 2024
Significant upgrade, laying groundwork for Grok 3
Grok 3
Feb 2025
Breakthrough model with DeepSearch and Think mode. Competitive benchmarks.
Grok 4
Jul 2025
Integrated reasoning, multi agent Heavy variant
Grok 4.1
Nov 2025
Refined personality and usability. Preferred 64%+ of the time over Grok 4.
Grok 4.20 Beta
Mar 2026
Multi agent capabilities, expanded Batch API (image and video), Provisioned Throughput.
0%
User preference for Grok 4.1 over Grok 4
0K
Token context (SuperGrok)
0K+
Token context (SuperGrok Heavy)