diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index a899ac7..2ce25fe 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.1.0-alpha.31"
+  ".": "0.1.0-alpha.32"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 0b08725..39413df 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 68
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai-b60d5559d5150ecd3b49136064e5e251d832899770ff385b711378389afba370.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai-7b0a5d715d94f75ac7795bd4d2175a0e3243af9b935a86c273f371e45583140f.yml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b91132..4700755 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.1.0-alpha.32 (2024-10-30)
+
+Full Changelog: [v0.1.0-alpha.31...v0.1.0-alpha.32](https://github.com/openai/openai-go/compare/v0.1.0-alpha.31...v0.1.0-alpha.32)
+
+### Features
+
+* **api:** add new, expressive voices for Realtime and Audio in Chat Completions ([#101](https://github.com/openai/openai-go/issues/101)) ([f946acc](https://github.com/openai/openai-go/commit/f946acc71a92f885bed87f0d4e724fb40cae0f14))
+
 ## 0.1.0-alpha.31 (2024-10-23)
 
 Full Changelog: [v0.1.0-alpha.30...v0.1.0-alpha.31](https://github.com/openai/openai-go/compare/v0.1.0-alpha.30...v0.1.0-alpha.31)
diff --git a/README.md b/README.md
index 99414bd..9b8fcee 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Or to pin the version:
 <!-- x-release-please-start-version -->
 
 ```sh
-go get -u 'github.com/openai/openai-go@v0.1.0-alpha.31'
+go get -u 'github.com/openai/openai-go@v0.1.0-alpha.32'
 ```
 
 <!-- x-release-please-end -->
diff --git a/chatcompletion.go b/chatcompletion.go
index 177831a..d21896f 100644
--- a/chatcompletion.go
+++ b/chatcompletion.go
@@ -454,8 +454,8 @@ type ChatCompletionAudioParam struct {
 	// Specifies the output audio format. Must be one of `wav`, `mp3`, `flac`, `opus`,
 	// or `pcm16`.
 	Format param.Field[ChatCompletionAudioParamFormat] `json:"format,required"`
-	// Specifies the voice type. Supported voices are `alloy`, `echo`, `fable`, `onyx`,
-	// `nova`, and `shimmer`.
+	// The voice the model uses to respond. Supported voices are `alloy`, `ash`,
+	// `ballad`, `coral`, `echo`, `sage`, `shimmer`, and `verse`.
 	Voice param.Field[ChatCompletionAudioParamVoice] `json:"voice,required"`
 }
 
@@ -483,22 +483,24 @@ func (r ChatCompletionAudioParamFormat) IsKnown() bool {
 	return false
 }
 
-// Specifies the voice type. Supported voices are `alloy`, `echo`, `fable`, `onyx`,
-// `nova`, and `shimmer`.
+// The voice the model uses to respond. Supported voices are `alloy`, `ash`,
+// `ballad`, `coral`, `echo`, `sage`, `shimmer`, and `verse`.
 type ChatCompletionAudioParamVoice string
 
 const (
 	ChatCompletionAudioParamVoiceAlloy   ChatCompletionAudioParamVoice = "alloy"
+	ChatCompletionAudioParamVoiceAsh     ChatCompletionAudioParamVoice = "ash"
+	ChatCompletionAudioParamVoiceBallad  ChatCompletionAudioParamVoice = "ballad"
+	ChatCompletionAudioParamVoiceCoral   ChatCompletionAudioParamVoice = "coral"
 	ChatCompletionAudioParamVoiceEcho    ChatCompletionAudioParamVoice = "echo"
-	ChatCompletionAudioParamVoiceFable   ChatCompletionAudioParamVoice = "fable"
-	ChatCompletionAudioParamVoiceOnyx    ChatCompletionAudioParamVoice = "onyx"
-	ChatCompletionAudioParamVoiceNova    ChatCompletionAudioParamVoice = "nova"
+	ChatCompletionAudioParamVoiceSage    ChatCompletionAudioParamVoice = "sage"
 	ChatCompletionAudioParamVoiceShimmer ChatCompletionAudioParamVoice = "shimmer"
+	ChatCompletionAudioParamVoiceVerse   ChatCompletionAudioParamVoice = "verse"
 )
 
 func (r ChatCompletionAudioParamVoice) IsKnown() bool {
 	switch r {
-	case ChatCompletionAudioParamVoiceAlloy, ChatCompletionAudioParamVoiceEcho, ChatCompletionAudioParamVoiceFable, ChatCompletionAudioParamVoiceOnyx, ChatCompletionAudioParamVoiceNova, ChatCompletionAudioParamVoiceShimmer:
+	case ChatCompletionAudioParamVoiceAlloy, ChatCompletionAudioParamVoiceAsh, ChatCompletionAudioParamVoiceBallad, ChatCompletionAudioParamVoiceCoral, ChatCompletionAudioParamVoiceEcho, ChatCompletionAudioParamVoiceSage, ChatCompletionAudioParamVoiceShimmer, ChatCompletionAudioParamVoiceVerse:
 		return true
 	}
 	return false
@@ -531,7 +533,7 @@ type ChatCompletionChunk struct {
 	// `stream_options: {"include_usage": true}` in your request. When present, it
 	// contains a null value except for the last chunk which contains the token usage
 	// statistics for the entire request.
-	Usage CompletionUsage         `json:"usage"`
+	Usage CompletionUsage         `json:"usage,nullable"`
 	JSON  chatCompletionChunkJSON `json:"-"`
 }
 
diff --git a/internal/version.go b/internal/version.go
index 3cc749b..e319672 100644
--- a/internal/version.go
+++ b/internal/version.go
@@ -2,4 +2,4 @@
 
 package internal
 
-const PackageVersion = "0.1.0-alpha.31" // x-release-please-version
+const PackageVersion = "0.1.0-alpha.32" // x-release-please-version