diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 7e56fe29..e2f2c074 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.1.0-alpha.16"
+  ".": "0.1.0-alpha.17"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index da919d93..5776427f 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 103
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-d4f03b16daf0bae33be634c959dafb0e21b0bcb156beb162f8235394dca88e7c.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-c8fc7d0bf70bf7ed91a141f346a02929e4d25a6fac7b59f58b68136ed6ff024f.yml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47fdc801..96521ae9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## 0.1.0-alpha.17 (2025-03-01)
+
+Full Changelog: [v0.1.0-alpha.16...v0.1.0-alpha.17](https://github.com/orbcorp/orb-ruby/compare/v0.1.0-alpha.16...v0.1.0-alpha.17)
+
+### Features
+
+* **api:** api update ([#87](https://github.com/orbcorp/orb-ruby/issues/87)) ([6ff5a68](https://github.com/orbcorp/orb-ruby/commit/6ff5a682d25a1cbb2f6a304170470d9d3dd70d75))
+
+
+### Chores
+
+* be consistent and use lower case headers everywhere ([#86](https://github.com/orbcorp/orb-ruby/issues/86)) ([5685579](https://github.com/orbcorp/orb-ruby/commit/568557971e59178c9fbc1ff5c652bc877339f99a))
+* **internal:** version bump ([#84](https://github.com/orbcorp/orb-ruby/issues/84)) ([dde5ec6](https://github.com/orbcorp/orb-ruby/commit/dde5ec65592643398e1947680317208ebeb3bb8c))
+
 ## 0.1.0-alpha.16 (2025-02-28)
 
 Full Changelog: [v0.1.0-alpha.15...v0.1.0-alpha.16](https://github.com/orbcorp/orb-ruby/compare/v0.1.0-alpha.15...v0.1.0-alpha.16)
diff --git a/Gemfile.lock b/Gemfile.lock
index 62f8ddc9..22b3ea33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GIT
 PATH
   remote: .
   specs:
-    orb (0.1.0.pre.alpha.16)
+    orb (0.1.0.pre.alpha.17)
       connection_pool
 
 GEM
diff --git a/lib/orb/client.rb b/lib/orb/client.rb
index 1b263fc0..051d441e 100644
--- a/lib/orb/client.rb
+++ b/lib/orb/client.rb
@@ -67,7 +67,7 @@ class Client < Orb::BaseClient
     private def auth_headers
       return {} if @api_key.nil?
 
-      {"Authorization" => "Bearer #{@api_key}"}
+      {"authorization" => "Bearer #{@api_key}"}
     end
 
     # Creates and returns a new client for interacting with the API.
diff --git a/lib/orb/models/invoice.rb b/lib/orb/models/invoice.rb
index 38a45434..00a45591 100644
--- a/lib/orb/models/invoice.rb
+++ b/lib/orb/models/invoice.rb
@@ -1211,6 +1211,12 @@ class LineItem < Orb::BaseModel
         #   @return [Time]
         required :end_date, Time
 
+        # @!attribute filter
+        #   An additional filter that was used to calculate the usage for this line item.
+        #
+        #   @return [String, nil]
+        required :filter, String, nil?: true
+
         # @!attribute grouping
         #   [DEPRECATED] For configured prices that are split by a grouping key, this will
         #     be populated with the key and a value. The `amount` and `subtotal` will be the
@@ -1302,6 +1308,12 @@ class LineItem < Orb::BaseModel
         #   @return [Array<Orb::Models::Invoice::LineItem::TaxAmount>]
         required :tax_amounts, -> { Orb::ArrayOf[Orb::Models::Invoice::LineItem::TaxAmount] }
 
+        # @!attribute usage_customer_ids
+        #   A list of customer ids that were used to calculate the usage for this line item.
+        #
+        #   @return [Array<String>, nil]
+        required :usage_customer_ids, Orb::ArrayOf[String], nil?: true
+
         # @!parse
         #   # @param id [String]
         #   # @param adjusted_subtotal [String]
@@ -1310,6 +1322,7 @@ class LineItem < Orb::BaseModel
         #   # @param credits_applied [String]
         #   # @param discount [Orb::Models::PercentageDiscount, Orb::Models::TrialDiscount, Orb::Models::Discount::UsageDiscount, Orb::Models::AmountDiscount, nil]
         #   # @param end_date [Time]
+        #   # @param filter [String, nil]
         #   # @param grouping [String, nil]
         #   # @param maximum [Orb::Models::Invoice::LineItem::Maximum, nil]
         #   # @param maximum_amount [String, nil]
@@ -1323,6 +1336,7 @@ class LineItem < Orb::BaseModel
         #   # @param sub_line_items [Array<Orb::Models::Invoice::LineItem::SubLineItem::MatrixSubLineItem, Orb::Models::Invoice::LineItem::SubLineItem::TierSubLineItem, Orb::Models::Invoice::LineItem::SubLineItem::OtherSubLineItem>]
         #   # @param subtotal [String]
         #   # @param tax_amounts [Array<Orb::Models::Invoice::LineItem::TaxAmount>]
+        #   # @param usage_customer_ids [Array<String>, nil]
         #   #
         #   def initialize(
         #     id:,
@@ -1332,6 +1346,7 @@ class LineItem < Orb::BaseModel
         #     credits_applied:,
         #     discount:,
         #     end_date:,
+        #     filter:,
         #     grouping:,
         #     maximum:,
         #     maximum_amount:,
@@ -1345,6 +1360,7 @@ class LineItem < Orb::BaseModel
         #     sub_line_items:,
         #     subtotal:,
         #     tax_amounts:,
+        #     usage_customer_ids:,
         #     **
         #   )
         #     super
diff --git a/lib/orb/models/invoice_fetch_upcoming_response.rb b/lib/orb/models/invoice_fetch_upcoming_response.rb
index 098f4a66..a6d5548c 100644
--- a/lib/orb/models/invoice_fetch_upcoming_response.rb
+++ b/lib/orb/models/invoice_fetch_upcoming_response.rb
@@ -1211,6 +1211,12 @@ class LineItem < Orb::BaseModel
         #   @return [Time]
         required :end_date, Time
 
+        # @!attribute filter
+        #   An additional filter that was used to calculate the usage for this line item.
+        #
+        #   @return [String, nil]
+        required :filter, String, nil?: true
+
         # @!attribute grouping
         #   [DEPRECATED] For configured prices that are split by a grouping key, this will
         #     be populated with the key and a value. The `amount` and `subtotal` will be the
@@ -1303,6 +1309,12 @@ class LineItem < Orb::BaseModel
         #   @return [Array<Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount>]
         required :tax_amounts, -> { Orb::ArrayOf[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount] }
 
+        # @!attribute usage_customer_ids
+        #   A list of customer ids that were used to calculate the usage for this line item.
+        #
+        #   @return [Array<String>, nil]
+        required :usage_customer_ids, Orb::ArrayOf[String], nil?: true
+
         # @!parse
         #   # @param id [String]
         #   # @param adjusted_subtotal [String]
@@ -1311,6 +1323,7 @@ class LineItem < Orb::BaseModel
         #   # @param credits_applied [String]
         #   # @param discount [Orb::Models::PercentageDiscount, Orb::Models::TrialDiscount, Orb::Models::Discount::UsageDiscount, Orb::Models::AmountDiscount, nil]
         #   # @param end_date [Time]
+        #   # @param filter [String, nil]
         #   # @param grouping [String, nil]
         #   # @param maximum [Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum, nil]
         #   # @param maximum_amount [String, nil]
@@ -1324,6 +1337,7 @@ class LineItem < Orb::BaseModel
         #   # @param sub_line_items [Array<Orb::Models::InvoiceFetchUpcomingResponse::LineItem::SubLineItem::MatrixSubLineItem, Orb::Models::InvoiceFetchUpcomingResponse::LineItem::SubLineItem::TierSubLineItem, Orb::Models::InvoiceFetchUpcomingResponse::LineItem::SubLineItem::OtherSubLineItem>]
         #   # @param subtotal [String]
         #   # @param tax_amounts [Array<Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount>]
+        #   # @param usage_customer_ids [Array<String>, nil]
         #   #
         #   def initialize(
         #     id:,
@@ -1333,6 +1347,7 @@ class LineItem < Orb::BaseModel
         #     credits_applied:,
         #     discount:,
         #     end_date:,
+        #     filter:,
         #     grouping:,
         #     maximum:,
         #     maximum_amount:,
@@ -1346,6 +1361,7 @@ class LineItem < Orb::BaseModel
         #     sub_line_items:,
         #     subtotal:,
         #     tax_amounts:,
+        #     usage_customer_ids:,
         #     **
         #   )
         #     super
diff --git a/lib/orb/models/invoice_line_item_create_response.rb b/lib/orb/models/invoice_line_item_create_response.rb
index 8ac3bd8a..0878e321 100644
--- a/lib/orb/models/invoice_line_item_create_response.rb
+++ b/lib/orb/models/invoice_line_item_create_response.rb
@@ -46,6 +46,12 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #   @return [Time]
       required :end_date, Time
 
+      # @!attribute filter
+      #   An additional filter that was used to calculate the usage for this line item.
+      #
+      #   @return [String, nil]
+      required :filter, String, nil?: true
+
       # @!attribute grouping
       #   [DEPRECATED] For configured prices that are split by a grouping key, this will
       #     be populated with the key and a value. The `amount` and `subtotal` will be the
@@ -138,6 +144,12 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #   @return [Array<Orb::Models::InvoiceLineItemCreateResponse::TaxAmount>]
       required :tax_amounts, -> { Orb::ArrayOf[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount] }
 
+      # @!attribute usage_customer_ids
+      #   A list of customer ids that were used to calculate the usage for this line item.
+      #
+      #   @return [Array<String>, nil]
+      required :usage_customer_ids, Orb::ArrayOf[String], nil?: true
+
       # @!parse
       #   # @param id [String]
       #   # @param adjusted_subtotal [String]
@@ -146,6 +158,7 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #   # @param credits_applied [String]
       #   # @param discount [Orb::Models::PercentageDiscount, Orb::Models::TrialDiscount, Orb::Models::Discount::UsageDiscount, Orb::Models::AmountDiscount, nil]
       #   # @param end_date [Time]
+      #   # @param filter [String, nil]
       #   # @param grouping [String, nil]
       #   # @param maximum [Orb::Models::InvoiceLineItemCreateResponse::Maximum, nil]
       #   # @param maximum_amount [String, nil]
@@ -159,6 +172,7 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #   # @param sub_line_items [Array<Orb::Models::InvoiceLineItemCreateResponse::SubLineItem::MatrixSubLineItem, Orb::Models::InvoiceLineItemCreateResponse::SubLineItem::TierSubLineItem, Orb::Models::InvoiceLineItemCreateResponse::SubLineItem::OtherSubLineItem>]
       #   # @param subtotal [String]
       #   # @param tax_amounts [Array<Orb::Models::InvoiceLineItemCreateResponse::TaxAmount>]
+      #   # @param usage_customer_ids [Array<String>, nil]
       #   #
       #   def initialize(
       #     id:,
@@ -168,6 +182,7 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #     credits_applied:,
       #     discount:,
       #     end_date:,
+      #     filter:,
       #     grouping:,
       #     maximum:,
       #     maximum_amount:,
@@ -181,6 +196,7 @@ class InvoiceLineItemCreateResponse < Orb::BaseModel
       #     sub_line_items:,
       #     subtotal:,
       #     tax_amounts:,
+      #     usage_customer_ids:,
       #     **
       #   )
       #     super
diff --git a/lib/orb/version.rb b/lib/orb/version.rb
index fb1a470b..3f2ab75d 100644
--- a/lib/orb/version.rb
+++ b/lib/orb/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Orb
-  VERSION = "0.1.0-alpha.16"
+  VERSION = "0.1.0-alpha.17"
 end
diff --git a/rbi/lib/orb/models/invoice.rbi b/rbi/lib/orb/models/invoice.rbi
index 52d7fb98..90b16c14 100644
--- a/rbi/lib/orb/models/invoice.rbi
+++ b/rbi/lib/orb/models/invoice.rbi
@@ -1297,6 +1297,14 @@ module Orb
         def end_date=(_)
         end
 
+        sig { returns(T.nilable(String)) }
+        def filter
+        end
+
+        sig { params(_: T.nilable(String)).returns(T.nilable(String)) }
+        def filter=(_)
+        end
+
         sig { returns(T.nilable(String)) }
         def grouping
         end
@@ -1543,6 +1551,14 @@ module Orb
         def tax_amounts=(_)
         end
 
+        sig { returns(T.nilable(T::Array[String])) }
+        def usage_customer_ids
+        end
+
+        sig { params(_: T.nilable(T::Array[String])).returns(T.nilable(T::Array[String])) }
+        def usage_customer_ids=(_)
+        end
+
         sig do
           params(
             id: String,
@@ -1567,6 +1583,7 @@ module Orb
               )
             ),
             end_date: Time,
+            filter: T.nilable(String),
             grouping: T.nilable(String),
             maximum: T.nilable(Orb::Models::Invoice::LineItem::Maximum),
             maximum_amount: T.nilable(String),
@@ -1616,7 +1633,8 @@ module Orb
             )
             ],
             subtotal: String,
-            tax_amounts: T::Array[Orb::Models::Invoice::LineItem::TaxAmount]
+            tax_amounts: T::Array[Orb::Models::Invoice::LineItem::TaxAmount],
+            usage_customer_ids: T.nilable(T::Array[String])
           )
             .void
         end
@@ -1628,6 +1646,7 @@ module Orb
           credits_applied:,
           discount:,
           end_date:,
+          filter:,
           grouping:,
           maximum:,
           maximum_amount:,
@@ -1640,7 +1659,8 @@ module Orb
           start_date:,
           sub_line_items:,
           subtotal:,
-          tax_amounts:
+          tax_amounts:,
+          usage_customer_ids:
         )
         end
 
@@ -1670,6 +1690,7 @@ module Orb
                   )
                 ),
                 end_date: Time,
+                filter: T.nilable(String),
                 grouping: T.nilable(String),
                 maximum: T.nilable(Orb::Models::Invoice::LineItem::Maximum),
                 maximum_amount: T.nilable(String),
@@ -1719,7 +1740,8 @@ module Orb
                 )
                 ],
                 subtotal: String,
-                tax_amounts: T::Array[Orb::Models::Invoice::LineItem::TaxAmount]
+                tax_amounts: T::Array[Orb::Models::Invoice::LineItem::TaxAmount],
+                usage_customer_ids: T.nilable(T::Array[String])
               }
             )
         end
diff --git a/rbi/lib/orb/models/invoice_fetch_upcoming_response.rbi b/rbi/lib/orb/models/invoice_fetch_upcoming_response.rbi
index a07c9f22..625654aa 100644
--- a/rbi/lib/orb/models/invoice_fetch_upcoming_response.rbi
+++ b/rbi/lib/orb/models/invoice_fetch_upcoming_response.rbi
@@ -1315,6 +1315,14 @@ module Orb
         def end_date=(_)
         end
 
+        sig { returns(T.nilable(String)) }
+        def filter
+        end
+
+        sig { params(_: T.nilable(String)).returns(T.nilable(String)) }
+        def filter=(_)
+        end
+
         sig { returns(T.nilable(String)) }
         def grouping
         end
@@ -1561,6 +1569,14 @@ module Orb
         def tax_amounts=(_)
         end
 
+        sig { returns(T.nilable(T::Array[String])) }
+        def usage_customer_ids
+        end
+
+        sig { params(_: T.nilable(T::Array[String])).returns(T.nilable(T::Array[String])) }
+        def usage_customer_ids=(_)
+        end
+
         sig do
           params(
             id: String,
@@ -1585,6 +1601,7 @@ module Orb
               )
             ),
             end_date: Time,
+            filter: T.nilable(String),
             grouping: T.nilable(String),
             maximum: T.nilable(Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum),
             maximum_amount: T.nilable(String),
@@ -1634,7 +1651,8 @@ module Orb
             )
             ],
             subtotal: String,
-            tax_amounts: T::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount]
+            tax_amounts: T::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount],
+            usage_customer_ids: T.nilable(T::Array[String])
           )
             .void
         end
@@ -1646,6 +1664,7 @@ module Orb
           credits_applied:,
           discount:,
           end_date:,
+          filter:,
           grouping:,
           maximum:,
           maximum_amount:,
@@ -1658,7 +1677,8 @@ module Orb
           start_date:,
           sub_line_items:,
           subtotal:,
-          tax_amounts:
+          tax_amounts:,
+          usage_customer_ids:
         )
         end
 
@@ -1688,6 +1708,7 @@ module Orb
                   )
                 ),
                 end_date: Time,
+                filter: T.nilable(String),
                 grouping: T.nilable(String),
                 maximum: T.nilable(Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum),
                 maximum_amount: T.nilable(String),
@@ -1737,7 +1758,8 @@ module Orb
                 )
                 ],
                 subtotal: String,
-                tax_amounts: T::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount]
+                tax_amounts: T::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount],
+                usage_customer_ids: T.nilable(T::Array[String])
               }
             )
         end
diff --git a/rbi/lib/orb/models/invoice_line_item_create_response.rbi b/rbi/lib/orb/models/invoice_line_item_create_response.rbi
index 67acabed..11fdabdf 100644
--- a/rbi/lib/orb/models/invoice_line_item_create_response.rbi
+++ b/rbi/lib/orb/models/invoice_line_item_create_response.rbi
@@ -126,6 +126,14 @@ module Orb
       def end_date=(_)
       end
 
+      sig { returns(T.nilable(String)) }
+      def filter
+      end
+
+      sig { params(_: T.nilable(String)).returns(T.nilable(String)) }
+      def filter=(_)
+      end
+
       sig { returns(T.nilable(String)) }
       def grouping
       end
@@ -372,6 +380,14 @@ module Orb
       def tax_amounts=(_)
       end
 
+      sig { returns(T.nilable(T::Array[String])) }
+      def usage_customer_ids
+      end
+
+      sig { params(_: T.nilable(T::Array[String])).returns(T.nilable(T::Array[String])) }
+      def usage_customer_ids=(_)
+      end
+
       sig do
         params(
           id: String,
@@ -396,6 +412,7 @@ module Orb
             )
           ),
           end_date: Time,
+          filter: T.nilable(String),
           grouping: T.nilable(String),
           maximum: T.nilable(Orb::Models::InvoiceLineItemCreateResponse::Maximum),
           maximum_amount: T.nilable(String),
@@ -445,7 +462,8 @@ module Orb
           )
           ],
           subtotal: String,
-          tax_amounts: T::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]
+          tax_amounts: T::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount],
+          usage_customer_ids: T.nilable(T::Array[String])
         )
           .void
       end
@@ -457,6 +475,7 @@ module Orb
         credits_applied:,
         discount:,
         end_date:,
+        filter:,
         grouping:,
         maximum:,
         maximum_amount:,
@@ -469,7 +488,8 @@ module Orb
         start_date:,
         sub_line_items:,
         subtotal:,
-        tax_amounts:
+        tax_amounts:,
+        usage_customer_ids:
       )
       end
 
@@ -499,6 +519,7 @@ module Orb
                 )
               ),
               end_date: Time,
+              filter: T.nilable(String),
               grouping: T.nilable(String),
               maximum: T.nilable(Orb::Models::InvoiceLineItemCreateResponse::Maximum),
               maximum_amount: T.nilable(String),
@@ -548,7 +569,8 @@ module Orb
               )
               ],
               subtotal: String,
-              tax_amounts: T::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]
+              tax_amounts: T::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount],
+              usage_customer_ids: T.nilable(T::Array[String])
             }
           )
       end
diff --git a/rbi/lib/orb/version.rbi b/rbi/lib/orb/version.rbi
index c739ac47..07369958 100644
--- a/rbi/lib/orb/version.rbi
+++ b/rbi/lib/orb/version.rbi
@@ -1,5 +1,5 @@
 # typed: strong
 
 module Orb
-  VERSION = "0.1.0-alpha.16"
+  VERSION = "0.1.0-alpha.17"
 end
diff --git a/sig/orb/models/invoice.rbs b/sig/orb/models/invoice.rbs
index b40d9e3a..3cff062c 100644
--- a/sig/orb/models/invoice.rbs
+++ b/sig/orb/models/invoice.rbs
@@ -779,6 +779,7 @@ module Orb
           credits_applied: String,
           discount: Orb::Models::discount?,
           end_date: Time,
+          filter: String?,
           grouping: String?,
           maximum: Orb::Models::Invoice::LineItem::Maximum?,
           maximum_amount: String?,
@@ -791,7 +792,8 @@ module Orb
           start_date: Time,
           sub_line_items: ::Array[Orb::Models::Invoice::LineItem::sub_line_item],
           subtotal: String,
-          tax_amounts: ::Array[Orb::Models::Invoice::LineItem::TaxAmount]
+          tax_amounts: ::Array[Orb::Models::Invoice::LineItem::TaxAmount],
+          usage_customer_ids: ::Array[String]?
         }
 
       class LineItem < Orb::BaseModel
@@ -809,6 +811,8 @@ module Orb
 
         attr_accessor end_date: Time
 
+        attr_accessor filter: String?
+
         attr_accessor grouping: String?
 
         attr_accessor maximum: Orb::Models::Invoice::LineItem::Maximum?
@@ -835,6 +839,8 @@ module Orb
 
         attr_accessor tax_amounts: ::Array[Orb::Models::Invoice::LineItem::TaxAmount]
 
+        attr_accessor usage_customer_ids: ::Array[String]?
+
         def initialize:
           (
             id: String,
@@ -844,6 +850,7 @@ module Orb
             credits_applied: String,
             discount: Orb::Models::discount?,
             end_date: Time,
+            filter: String?,
             grouping: String?,
             maximum: Orb::Models::Invoice::LineItem::Maximum?,
             maximum_amount: String?,
@@ -856,7 +863,8 @@ module Orb
             start_date: Time,
             sub_line_items: ::Array[Orb::Models::Invoice::LineItem::sub_line_item],
             subtotal: String,
-            tax_amounts: ::Array[Orb::Models::Invoice::LineItem::TaxAmount]
+            tax_amounts: ::Array[Orb::Models::Invoice::LineItem::TaxAmount],
+            usage_customer_ids: ::Array[String]?
           ) -> void
           | (?Orb::Models::Invoice::line_item | Orb::BaseModel data) -> void
 
diff --git a/sig/orb/models/invoice_fetch_upcoming_response.rbs b/sig/orb/models/invoice_fetch_upcoming_response.rbs
index 45e8247c..83cf8f58 100644
--- a/sig/orb/models/invoice_fetch_upcoming_response.rbs
+++ b/sig/orb/models/invoice_fetch_upcoming_response.rbs
@@ -790,6 +790,7 @@ module Orb
           credits_applied: String,
           discount: Orb::Models::discount?,
           end_date: Time,
+          filter: String?,
           grouping: String?,
           maximum: Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum?,
           maximum_amount: String?,
@@ -802,7 +803,8 @@ module Orb
           start_date: Time,
           sub_line_items: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::sub_line_item],
           subtotal: String,
-          tax_amounts: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount]
+          tax_amounts: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount],
+          usage_customer_ids: ::Array[String]?
         }
 
       class LineItem < Orb::BaseModel
@@ -820,6 +822,8 @@ module Orb
 
         attr_accessor end_date: Time
 
+        attr_accessor filter: String?
+
         attr_accessor grouping: String?
 
         attr_accessor maximum: Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum?
@@ -846,6 +850,8 @@ module Orb
 
         attr_accessor tax_amounts: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount]
 
+        attr_accessor usage_customer_ids: ::Array[String]?
+
         def initialize:
           (
             id: String,
@@ -855,6 +861,7 @@ module Orb
             credits_applied: String,
             discount: Orb::Models::discount?,
             end_date: Time,
+            filter: String?,
             grouping: String?,
             maximum: Orb::Models::InvoiceFetchUpcomingResponse::LineItem::Maximum?,
             maximum_amount: String?,
@@ -867,7 +874,8 @@ module Orb
             start_date: Time,
             sub_line_items: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::sub_line_item],
             subtotal: String,
-            tax_amounts: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount]
+            tax_amounts: ::Array[Orb::Models::InvoiceFetchUpcomingResponse::LineItem::TaxAmount],
+            usage_customer_ids: ::Array[String]?
           ) -> void
           | (
             ?Orb::Models::InvoiceFetchUpcomingResponse::line_item
diff --git a/sig/orb/models/invoice_line_item_create_response.rbs b/sig/orb/models/invoice_line_item_create_response.rbs
index 05481db3..1b29914c 100644
--- a/sig/orb/models/invoice_line_item_create_response.rbs
+++ b/sig/orb/models/invoice_line_item_create_response.rbs
@@ -9,6 +9,7 @@ module Orb
         credits_applied: String,
         discount: Orb::Models::discount?,
         end_date: Time,
+        filter: String?,
         grouping: String?,
         maximum: Orb::Models::InvoiceLineItemCreateResponse::Maximum?,
         maximum_amount: String?,
@@ -21,7 +22,8 @@ module Orb
         start_date: Time,
         sub_line_items: ::Array[Orb::Models::InvoiceLineItemCreateResponse::sub_line_item],
         subtotal: String,
-        tax_amounts: ::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]
+        tax_amounts: ::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount],
+        usage_customer_ids: ::Array[String]?
       }
 
     class InvoiceLineItemCreateResponse < Orb::BaseModel
@@ -39,6 +41,8 @@ module Orb
 
       attr_accessor end_date: Time
 
+      attr_accessor filter: String?
+
       attr_accessor grouping: String?
 
       attr_accessor maximum: Orb::Models::InvoiceLineItemCreateResponse::Maximum?
@@ -65,6 +69,8 @@ module Orb
 
       attr_accessor tax_amounts: ::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]
 
+      attr_accessor usage_customer_ids: ::Array[String]?
+
       def initialize:
         (
           id: String,
@@ -74,6 +80,7 @@ module Orb
           credits_applied: String,
           discount: Orb::Models::discount?,
           end_date: Time,
+          filter: String?,
           grouping: String?,
           maximum: Orb::Models::InvoiceLineItemCreateResponse::Maximum?,
           maximum_amount: String?,
@@ -86,7 +93,8 @@ module Orb
           start_date: Time,
           sub_line_items: ::Array[Orb::Models::InvoiceLineItemCreateResponse::sub_line_item],
           subtotal: String,
-          tax_amounts: ::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]
+          tax_amounts: ::Array[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount],
+          usage_customer_ids: ::Array[String]?
         ) -> void
         | (
           ?Orb::Models::invoice_line_item_create_response | Orb::BaseModel data
diff --git a/sig/orb/version.rbs b/sig/orb/version.rbs
index 031191a0..83d18e53 100644
--- a/sig/orb/version.rbs
+++ b/sig/orb/version.rbs
@@ -1,3 +1,3 @@
 module Orb
-  VERSION: "0.1.0-alpha.15"
+  VERSION: "0.1.0-alpha.16"
 end
diff --git a/test/orb/resources/invoice_line_items_test.rb b/test/orb/resources/invoice_line_items_test.rb
index b62c5052..6664a17f 100644
--- a/test/orb/resources/invoice_line_items_test.rb
+++ b/test/orb/resources/invoice_line_items_test.rb
@@ -26,6 +26,7 @@ def test_create_required_params
         credits_applied: String,
         discount: Orb::Models::Discount | nil,
         end_date: Time,
+        filter: String | nil,
         grouping: String | nil,
         maximum: Orb::Models::InvoiceLineItemCreateResponse::Maximum | nil,
         maximum_amount: String | nil,
@@ -38,7 +39,8 @@ def test_create_required_params
         start_date: Time,
         sub_line_items: ^(Orb::ArrayOf[union: Orb::Models::InvoiceLineItemCreateResponse::SubLineItem]),
         subtotal: String,
-        tax_amounts: ^(Orb::ArrayOf[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount])
+        tax_amounts: ^(Orb::ArrayOf[Orb::Models::InvoiceLineItemCreateResponse::TaxAmount]),
+        usage_customer_ids: ^(Orb::ArrayOf[String]) | nil
       }
     end
   end