x_ai: Add Grok 4.5 and Grok 4.6 models (#63234)

Release Notes:

- xAI: Add Grok 4.6 and Grok 4.5 models

Co-authored-by: Yang Yang <geraint0923@gmail.com>
081a45f6f8Bennet Bo Fenner committed on 8/26/2026, 8:04:05 AM· committed by GitHubparent7040aa5
2 files changedLine totals unavailable