891307f6c2
xAI deprecated search_parameters - now requires Agent Tools API:
- Changed endpoint from /v1/chat/completions to /v1/responses
- Changed from messages array to input array format
- Changed from search_parameters to tools: [{"type": "x_search"}]
- Updated model selection to grok-4-1-fast (required for x_search tool)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>