LLM GatewaygrokGrok 4.7 (Vertex AI (OpenAI-compatible))vertex-openai/grok-4-7LLM GatewayReleased Sep 21, 2026524,288 token context windowIn $2.00 · Out $6.00ReasoningTool callingStructured outputAttachmentsTemp controlsInputtextimagepdfOutputtext