feat(xai): update model YAMLs [bot] (#1767)

Co-authored-by: Truefoundry Models Bot <truefoundry-models-bot@users.noreply.github.com>

Author: models-bot[bot]

providers/xai/grok-3.yaml

@@ -1,16 +1,17 @@
 costs:
     - cache_read_input_token_cost: 7.5e-7
-      input_cost_per_token: 0.000003
-      input_cost_per_token_batches: 0.0000015
-      output_cost_per_token: 0.000015
-      output_cost_per_token_batches: 0.0000075
+      input_cost_per_token: 3e-6
+      input_cost_per_token_batches: 1.5e-6
+      output_cost_per_token: 1.5e-5
+      output_cost_per_token_batches: 7.5e-6
       region: "*"
 features:
     - function_calling
     - structured_output
     - tool_choice
     - system_messages
     - prompt_caching
+isDeprecated: true
 limits:
     context_window: 131072
 modalities:
@@ -21,6 +22,7 @@ modalities:
 mode: chat
 model: grok-3
 provisioning: serverless
-status: active
+retirementDate: "2026-05-15"
+status: retired
 supportedModes:
     - chat