chore: update OpenAPI spec from monorepo (#437)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

.speakeasy/in.openapi.yaml

@@ -9646,6 +9646,80 @@ components:
         - b64_json
         - created
       type: object
+    ImageGenerationProviderPreferences:
+      description: Provider routing preferences and provider-specific passthrough configuration.
+      example:
+        allow_fallbacks: false
+        only:
+          - google-ai-studio
+      properties:
+        allow_fallbacks:
+          description: >
+            Whether to allow backup providers to serve requests
+
+            - true: (default) when the primary provider (or your custom providers in "order") is unavailable, use the
+            next best provider.
+
+            - false: use only the primary/custom provider, and return the upstream error if it's unavailable.
+          nullable: true
+          type: boolean
+        ignore:
+          description: >-
+            List of provider slugs to ignore. If provided, this list is merged with your account-wide ignored provider
+            settings for this request.
+          example:
+            - openai
+            - anthropic
+          items:
+            anyOf:
+              - $ref: '#/components/schemas/ProviderName'
+              - type: string
+          nullable: true
+          type: array
+        only:
+          description: >-
+            List of provider slugs to allow. If provided, this list is merged with your account-wide allowed provider
+            settings for this request.
+          example:
+            - openai
+            - anthropic
+          items:
+            anyOf:
+              - $ref: '#/components/schemas/ProviderName'
+              - type: string
+          nullable: true
+          type: array
+        options:
+          allOf:
+            - $ref: '#/components/schemas/ProviderOptions'
+            - example:
+                black-forest-labs:
+                  guidance: 3
+                  steps: 40
+        order:
+          description: >-
+            An ordered list of provider slugs. The router will attempt to use the first provider in the subset of this
+            list that supports your requested model, and fall back to the next if it is unavailable. If no providers are
+            available, the request will fail with an error message.
+          example:
+            - openai
+            - anthropic
+          items:
+            anyOf:
+              - $ref: '#/components/schemas/ProviderName'
+              - type: string
+          nullable: true
+          type: array
+        sort:
+          anyOf:
+            - $ref: '#/components/schemas/ProviderSort'
+            - $ref: '#/components/schemas/ProviderSortConfig'
+            - nullable: true
+          description: >-
+            The sorting strategy to use for this request, if "order" is not specified. When set, no load balancing is
+            performed.
+          example: price
+      type: object
     ImageGenerationRequest:
       description: Image generation request input
       example:
@@ -9722,16 +9796,7 @@ components:
           minLength: 1
           type: string
         provider:
-          description: Provider-specific passthrough configuration
+          $ref: '#/components/schemas/ImageGenerationProviderPreferences'
-          properties:
-            options:
-              allOf:
-                - $ref: '#/components/schemas/ProviderOptions'
-                - example:
-                    black-forest-labs:
-                      guidance: 3
-                      steps: 40
-          type: object
         quality:
           description: Rendering quality. Providers without a quality knob ignore this.
           enum: