Grok 4.3 Launches on xAI API: Complete Migration Guide for 8 Legacy Models Retiring on May 15
On May 6, 2026, xAI sent an official email to all API users titled "Grok 4.3 release and xAI API model retirement." The message delivered two critical updates for developers: Grok 4.3 is now fully available via the API, and eight legacy models—including grok-4-fast, grok-4-0709, grok-3, grok-code-fast-1, and grok-imagine-image-pro—will be retired on May 15, 2026,…
