diff --git a/src/proxy/middleware/request/preprocessors/apply-quota-limits.ts b/src/proxy/middleware/request/preprocessors/apply-quota-limits.ts
index 8c83302..62627f0 100644
--- a/src/proxy/middleware/request/preprocessors/apply-quota-limits.ts
+++ b/src/proxy/middleware/request/preprocessors/apply-quota-limits.ts
@@ -34,4 +34,4 @@ export const applyQuotaLimits: RequestPreprocessor = (req) => {
       }
     );
   }
-};
+};
\ No newline at end of file
diff --git a/src/proxy/middleware/request/preprocessors/count-prompt-tokens.ts b/src/proxy/middleware/request/preprocessors/count-prompt-tokens.ts
index 3ccc5a1..eadd1e4 100644
--- a/src/proxy/middleware/request/preprocessors/count-prompt-tokens.ts
+++ b/src/proxy/middleware/request/preprocessors/count-prompt-tokens.ts
@@ -22,6 +22,12 @@ export const countPromptTokens: RequestPreprocessor = async (req) => {
       result = await countTokens({ req, prompt, service });
       break;
     }
+    case "openai-responses": {
+      req.outputTokens = req.body.max_completion_tokens || req.body.max_tokens;
+      const prompt: OpenAIChatMessage[] = req.body.messages;
+      result = await countTokens({ req, prompt, service });
+      break;
+    }
     case "openai-text": {
       req.outputTokens = req.body.max_tokens;
       const prompt: string = req.body.prompt;
diff --git a/src/proxy/middleware/request/preprocessors/language-filter.ts b/src/proxy/middleware/request/preprocessors/language-filter.ts
index b193d07..e455129 100644
--- a/src/proxy/middleware/request/preprocessors/language-filter.ts
+++ b/src/proxy/middleware/request/preprocessors/language-filter.ts
@@ -78,6 +78,7 @@ function getPromptFromRequest(req: Request) {
         .join("\n\n");
     case "anthropic-text":
     case "openai-text":
+    case "openai-responses":
     case "openai-image":
     case "mistral-text":
       return body.prompt;
diff --git a/src/proxy/middleware/request/preprocessors/validate-vision.ts b/src/proxy/middleware/request/preprocessors/validate-vision.ts
index 705c2f9..8b203d9 100644
--- a/src/proxy/middleware/request/preprocessors/validate-vision.ts
+++ b/src/proxy/middleware/request/preprocessors/validate-vision.ts
@@ -23,6 +23,9 @@ export const validateVision: RequestPreprocessor = async (req) => {
     case "openai":
       hasImage = containsImageContentOpenAI(req.body.messages);
       break;
+    case "openai-responses":
+      hasImage = containsImageContentOpenAI(req.body.messages);
+      break;
     case "anthropic-chat":
       hasImage = containsImageContentAnthropic(req.body.messages);
       break;
diff --git a/src/proxy/middleware/response/error-generator.ts b/src/proxy/middleware/response/error-generator.ts
index e8ba40a..436054c 100644
--- a/src/proxy/middleware/response/error-generator.ts
+++ b/src/proxy/middleware/response/error-generator.ts
@@ -194,6 +194,21 @@ export function buildSpoofedCompletion({
 
   switch (format) {
     case "openai":
+    case "openai-responses":
+      return {
+        id: "error-" + id,
+        object: "chat.completion",
+        created: Date.now(),
+        model,
+        usage: { prompt_tokens: 0, completion_tokens: 0, total_tokens: 0 },
+        choices: [
+          {
+            message: { role: "assistant", content },
+            finish_reason: title,
+            index: 0,
+          },
+        ],
+      };
     case "mistral-ai":
       return {
         id: "error-" + id,
@@ -283,6 +298,15 @@ export function buildSpoofedSSE({
 
   switch (format) {
     case "openai":
+    case "openai-responses":
+      event = {
+        id: "chatcmpl-" + id,
+        object: "chat.completion.chunk",
+        created: Date.now(),
+        model,
+        choices: [{ delta: { content }, index: 0, finish_reason: title }],
+      };
+      break;
     case "mistral-ai":
       event = {
         id: "chatcmpl-" + id,
diff --git a/src/proxy/middleware/response/log-prompt.ts b/src/proxy/middleware/response/log-prompt.ts
index cd641c3..d0c8b79 100644
--- a/src/proxy/middleware/response/log-prompt.ts
+++ b/src/proxy/middleware/response/log-prompt.ts
@@ -72,6 +72,8 @@ const getPromptForRequest = (
   // format.
   switch (req.outboundApi) {
     case "openai":
+    case "openai-responses":
+      return req.body.messages;
     case "mistral-ai":
       return req.body.messages;
     case "anthropic-chat":
diff --git a/src/proxy/middleware/response/streaming/event-aggregator.ts b/src/proxy/middleware/response/streaming/event-aggregator.ts
index 1311fd1..0f0377e 100644
--- a/src/proxy/middleware/response/streaming/event-aggregator.ts
+++ b/src/proxy/middleware/response/streaming/event-aggregator.ts
@@ -84,7 +84,8 @@ export class EventAggregator {
   getFinalResponse() {
     switch (this.responseFormat) {
       case "openai":
-      case "google-ai": // TODO: this is probably wrong now that we support native Google Makersuite prompts
+      case "openai-responses":
+      case "google-ai":
         return mergeEventsForOpenAIChat(this.events);
       case "openai-text":
         return mergeEventsForOpenAIText(this.events);
diff --git a/src/shared/key-management/azure/provider.ts b/src/shared/key-management/azure/provider.ts
index b8b2243..535acac 100644
--- a/src/shared/key-management/azure/provider.ts
+++ b/src/shared/key-management/azure/provider.ts
@@ -79,6 +79,7 @@ export class AzureOpenAIKeyProvider implements KeyProvider<AzureOpenAIKey> {
         "azure-gpt41-nanoTokens": 0,
         "azure-o1Tokens": 0,
         "azure-o1-miniTokens": 0,
+        "azure-o1-proTokens": 0,
         "azure-o3-miniTokens": 0,
         "azure-o3Tokens": 0,
         "azure-o4-miniTokens": 0,
diff --git a/src/shared/users/user-store.ts b/src/shared/users/user-store.ts
index bfe4c67..09be8f4 100644
--- a/src/shared/users/user-store.ts
+++ b/src/shared/users/user-store.ts
@@ -427,6 +427,7 @@ function getModelFamilyForQuotaUsage(
   switch (api) {
     case "openai":
     case "openai-text":
+    case "openai-responses":
     case "openai-image":
       return getOpenAIModelFamily(model);
     case "anthropic-chat":