diff --git a/src/modules/aix/server/dispatch/dispatch.parsers.ts b/src/modules/aix/server/dispatch/dispatch.parsers.ts
index a16a076d6..8a492ddbe 100644
--- a/src/modules/aix/server/dispatch/dispatch.parsers.ts
+++ b/src/modules/aix/server/dispatch/dispatch.parsers.ts
@@ -2,10 +2,9 @@ import { z } from 'zod';
 
 import { safeErrorString } from '~/server/wire';
 
-import type { OpenAIWire } from '~/modules/llms/server/openai/openai.wiretypes';
-
 import { anthropicWire_ContentBlockDeltaEvent_Schema, anthropicWire_ContentBlockStartEvent_Schema, anthropicWire_ContentBlockStopEvent_Schema, anthropicWire_MessageDeltaEvent_Schema, anthropicWire_MessageStartEvent_Schema, anthropicWire_MessageStopEvent_Schema, AnthropicWireMessageResponse } from './anthropic/anthropic.wiretypes';
 import { geminiGeneratedContentResponseSchema, geminiHarmProbabilitySortFunction, GeminiSafetyRatings } from './gemini/gemini.wiretypes';
+import { openaiWire_ChatCompletionChunkResponse_Schema } from './openai/oai.wiretypes';
 import { wireOllamaChunkedOutputSchema } from './ollama/ollama.wiretypes';
 
 
@@ -282,7 +281,7 @@ export function createDispatchParserOpenAI(): DispatchParser {
   return function* (eventData: string): Generator<DispatchParsedEvent> {
 
     // Throws on malformed event data
-    const json: OpenAIWire.ChatCompletion.ResponseStreamingChunk = JSON.parse(eventData);
+    const json = openaiWire_ChatCompletionChunkResponse_Schema.parse(JSON.parse(eventData));
 
     // -> Model
     if (!hasBegun && json.model) {
diff --git a/src/modules/aix/server/dispatch/openai/oai.wiretypes.ts b/src/modules/aix/server/dispatch/openai/oai.wiretypes.ts
index f2366dd76..5def8e4b2 100644
--- a/src/modules/aix/server/dispatch/openai/oai.wiretypes.ts
+++ b/src/modules/aix/server/dispatch/openai/oai.wiretypes.ts
@@ -131,7 +131,7 @@ const openaiWire_ToolChoice_Schema = z.union([
 
 /// API: Content Generation - Request
 
-export type OpenaiWire_Message = z.infer<typeof openaiWire_Message_Schema>;
+export type OpenaiWire_ChatCompletionRequest = z.infer<typeof openaiWire_chatCompletionRequest_Schema>;
 export const openaiWire_chatCompletionRequest_Schema = z.object({
   // basic input
   model: z.string(),
@@ -203,6 +203,18 @@ const openaiWire_Usage_Schema = z.object({
   total_tokens: z.number(),
 });
 
+
+const openaiWire_UndocumentedError_Schema = z.object({
+  // (undocumented) first experienced on 2023-06-19 on streaming APIs
+  message: z.string().optional(),
+  type: z.string().optional(),
+  param: z.string().nullable().optional(),
+  code: z.string().nullable().optional(),
+});
+
+const openaiWire_UndocumentedWarning_Schema = z.string();
+
+
 const openaiWire_ChatCompletionChoice_Schema = z.object({
   index: z.number(),
 
@@ -252,7 +264,7 @@ const openaiWire_ChatCompletionChunkChoice_Schema = z.object({
 
 export type OpenaiWire_ChatCompletionChunkResponse = z.infer<typeof openaiWire_ChatCompletionChunkResponse_Schema>;
 export const openaiWire_ChatCompletionChunkResponse_Schema = z.object({
-  object: z.literal('chat.completion.chunk'),
+  object: z.enum(['chat.completion.chunk', '' /* [Azure] bad response */]),
   id: z.string(),
 
   /**
@@ -267,4 +279,8 @@ export const openaiWire_ChatCompletionChunkResponse_Schema = z.object({
   created: z.number(), // The Unix timestamp (in seconds) of when the chat completion was created.
   system_fingerprint: z.string().optional(), // The backend configuration that the model runs with.
   // service_tier: z.unknown().optional(),
+
+  // undocumented streaming messages
+  error: openaiWire_UndocumentedError_Schema.optional(),
+  warning: openaiWire_UndocumentedWarning_Schema.optional(),
 });
diff --git a/src/modules/llms/server/openai/openai.router.ts b/src/modules/llms/server/openai/openai.router.ts
index 64763f47d..ed66f345a 100644
--- a/src/modules/llms/server/openai/openai.router.ts
+++ b/src/modules/llms/server/openai/openai.router.ts
@@ -10,6 +10,8 @@ import { T2iCreateImageOutput, t2iCreateImagesOutputSchema } from '~/modules/t2i
 import { Brand } from '~/common/app.config';
 import { fixupHost } from '~/common/util/urlUtils';
 
+import type { OpenaiWire_ChatCompletionRequest } from '~/modules/aix/server/dispatch/openai/oai.wiretypes';
+
 import { OpenAIWire, WireOpenAICreateImageOutput, wireOpenAICreateImageOutputSchema, WireOpenAICreateImageRequest } from './openai.wiretypes';
 import { azureModelToModelDescription, deepseekModelToModelDescription, groqModelSortFn, groqModelToModelDescription, lmStudioModelToModelDescription, localAIModelToModelDescription, mistralModelsSort, mistralModelToModelDescription, oobaboogaModelToModelDescription, openAIModelFilter, openAIModelToModelDescription, openRouterModelFamilySortFn, openRouterModelToModelDescription, perplexityAIModelDescriptions, perplexityAIModelSort, togetherAIModelsToModelDescriptions } from './models.data';
 import { llmsChatGenerateWithFunctionsOutputSchema, llmsGenerateContextSchema, llmsListModelsOutputSchema, ModelDescriptionSchema } from '../llm.server.types';
@@ -283,7 +285,7 @@ export const llmOpenAIRouter = createTRPCRouter({
       const isFunctionsCall = !!functions && functions.length > 0;
 
       const completionsBody = openAIChatCompletionPayload(access.dialect, model, history, isFunctionsCall ? functions : null, forceFunctionName ?? null, 1, false);
-      const wireCompletions = await openaiPOSTOrThrow<OpenAIWire.ChatCompletion.Response, OpenAIWire.ChatCompletion.Request>(
+      const wireCompletions = await openaiPOSTOrThrow<OpenAIWire.ChatCompletion.Response, OpenaiWire_ChatCompletionRequest>(
         access, model.id, completionsBody, '/v1/chat/completions',
       );
 
@@ -627,7 +629,7 @@ export function openAIAccess(access: OpenAIAccessSchema, modelRefId: string | nu
 }
 
 
-export function openAIChatCompletionPayload(dialect: OpenAIDialects, model: OpenAIModelSchema, history: OpenAIHistorySchema, functions: OpenAIFunctionsSchema | null, forceFunctionName: string | null, n: number, stream: boolean): OpenAIWire.ChatCompletion.Request {
+export function openAIChatCompletionPayload(dialect: OpenAIDialects, model: OpenAIModelSchema, history: OpenAIHistorySchema, functions: OpenAIFunctionsSchema | null, forceFunctionName: string | null, n: number, stream: boolean): OpenaiWire_ChatCompletionRequest {
 
   // Hotfixes to comply with API restrictions
   const hotfixAlternateUARoles = dialect === 'perplexity';