5.1

src/info-page.ts

@@ -42,6 +42,7 @@ const MODEL_FAMILY_FRIENDLY_NAME: { [f in ModelFamily]: string } = {
   "gpt41-mini": "GPT-4.1 Mini",
   "gpt41-nano": "GPT-4.1 Nano",
   gpt5: "GPT-5",
+  gpt51: "GPT-5.1",
   "gpt5-mini": "GPT-5 Mini",
   "gpt5-nano": "GPT-5 Nano",
   "gpt5-pro": "GPT-5 Pro",
@@ -84,6 +85,7 @@ const MODEL_FAMILY_FRIENDLY_NAME: { [f in ModelFamily]: string } = {
   "azure-gpt41-mini": "Azure GPT-4.1 Mini",
   "azure-gpt41-nano": "Azure GPT-4.1 Nano",
   "azure-gpt5": "Azure GPT-5",
+  "azure-gpt51": "Azure GPT-5.1",
   "azure-gpt5-mini": "Azure GPT-5 Mini",
   "azure-gpt5-nano": "Azure GPT-5 Nano",
   "azure-gpt5-pro": "GPT-5 Pro (Azure)",

src/proxy/middleware/request/preprocessors/validate-context-size.ts

@@ -67,6 +67,12 @@ export const validateContextSize: RequestPreprocessor = async (req) => {
     modelMax = 1000000;
   } else if (model.match(/^gpt-4\.1-nano(-\d{4}-\d{2}-\d{2})?$/)) {
     modelMax = 1000000;
+  } else if (model.match(/^gpt-5\.1(-\d{4}-\d{2}-\d{2})?$/)) {
+    modelMax = 400000;
+  } else if (model.match(/^gpt-5\.1-mini(-\d{4}-\d{2}-\d{2})?$/)) {
+    modelMax = 400000;
+  } else if (model.match(/^gpt-5\.1-nano(-\d{4}-\d{2}-\d{2})?$/)) {
+    modelMax = 400000;
   } else if (model.match(/^gpt-5(-\d{4}-\d{2}-\d{2})?$/)) {
     modelMax = 400000;
   } else if (model.match(/^gpt-5-mini(-\d{4}-\d{2}-\d{2})?$/)) {

src/proxy/openai.ts

@@ -487,13 +487,13 @@ function fixupMaxTokens(req: Request) {
   }
 }
 
-// GPT-5, GPT-5-mini, and GPT-5-nano don't support certain parameters
+// GPT-5, GPT-5.1, GPT-5-mini, and GPT-5-nano don't support certain parameters
 // Remove them if present to prevent API errors
 function filterGPT5UnsupportedParams(req: Request) {
   const model = req.body.model;
   
   // Only apply filtering to these specific models (gpt5-chat-latest supports all params)
-  const restrictedModels = /^gpt-5(-mini|-nano)?(-\d{4}-\d{2}-\d{2})?$/;
+  const restrictedModels = /^gpt-5(\\.1)?(-mini|-nano)?(-\d{4}-\d{2}-\d{2})?$/;
   
   if (!restrictedModels.test(model)) {
     return; // Not a restricted model, no filtering needed

src/service-info.ts

@@ -53,6 +53,7 @@ const MODEL_FAMILY_ORDER: ModelFamily[] = [
   "gpt41-nano",
   "gpt45",
   "gpt5",
+  "gpt51",
   "gpt5-mini",
   "gpt5-nano",
   "gpt5-chat-latest",
@@ -78,6 +79,7 @@ const MODEL_FAMILY_ORDER: ModelFamily[] = [
   "azure-gpt41-nano",
   "azure-gpt45",
   "azure-gpt5",
+  "azure-gpt51",
   "azure-gpt5-mini",
   "azure-gpt5-nano",
   "azure-gpt5-chat-latest",

src/shared/api-schemas/openai-responses.ts

@@ -20,7 +20,7 @@ export const OpenAIV1ResponsesSchema = z.object({
   frequency_penalty: z.number().min(-2).max(2).optional(),
   user: z.string().optional(),
   tools: z.array(z.any()).optional(),
-  reasoning_effort: z.enum(["low", "medium", "high"]).optional(),
+  reasoning_effort: z.enum(["none", "low", "medium", "high"]).optional(),
 });
 
 // Allow transforming from OpenAI Chat to Responses format

src/shared/api-schemas/openai.ts

@@ -77,7 +77,7 @@ export const OpenAIV1ChatCompletionSchema = z
     functions: z.array(z.any()).optional(),
     tool_choice: z.any().optional(),
     function_choice: z.any().optional(),
-    reasoning_effort: z.enum(["minimal", "low", "medium", "high"]).optional(),
+    reasoning_effort: z.enum(["none", "minimal", "low", "medium", "high"]).optional(),
     verbosity: z.enum(["low", "medium", "high"]).optional(),
     response_format: z.any(),
   })

src/shared/key-management/openai/provider.ts

@@ -146,8 +146,8 @@ export class OpenAIKeyProvider implements KeyProvider<OpenAIKey> {
     const excludeTrials = model === "text-embedding-ada-002";
     const isGptImageRequest = neededFamily === "gpt-image";
     
-    // GPT-5 models (gpt-5, gpt-5-mini, gpt-5-nano) require verified keys for streaming
+    // GPT-5 models (gpt-5, gpt-5.1, gpt-5-mini, gpt-5-nano) require verified keys for streaming
-    const isGpt5Model = /^gpt-5(-mini|-nano)?(-\d{4}-\d{2}-\d{2})?$/.test(model);
+    const isGpt5Model = /^gpt-5(\\.1)?(-mini|-nano)?(-\d{4}-\d{2}-\d{2})?$/.test(model);
     const isO1Model = /^o1(-mini|-preview)?(-\d{4}-\d{2}-\d{2})?$/.test(model);
     const isO3Model = /^o3(-mini)?(-\d{4}-\d{2}-\d{2})?$/.test(model);
     const isO4MiniModel = /^o4-mini(-\d{4}-\d{2}-\d{2})?$/.test(model);

src/shared/models.ts

@@ -33,6 +33,7 @@ export type OpenAIModelFamily =
   | "gpt41-nano"
   | "gpt45"
   | "gpt5"
+  | "gpt51"
   | "gpt5-mini"
   | "gpt5-nano"
   | "gpt5-chat-latest"
@@ -102,6 +103,7 @@ export const MODEL_FAMILIES = (<A extends readonly ModelFamily[]>(
   "gpt41-mini",
   "gpt41-nano",
   "gpt5",
+  "gpt51",
   "gpt5-mini",
   "gpt5-nano",
   "gpt5-chat-latest",
@@ -196,6 +198,7 @@ export const MODEL_FAMILY_SERVICE: {
   "gpt41-mini": "openai",
   "gpt41-nano": "openai",
   gpt5: "openai",
+  gpt51: "openai",
   "gpt5-mini": "openai",
   "gpt5-nano": "openai",
   "gpt5-chat-latest": "openai",
@@ -230,6 +233,7 @@ export const MODEL_FAMILY_SERVICE: {
   "azure-gpt41-mini": "azure",
   "azure-gpt41-nano": "azure",
   "azure-gpt5": "azure",
+  "azure-gpt51": "azure",
   "azure-gpt5-mini": "azure",
   "azure-gpt5-nano": "azure",
   "azure-gpt5-chat-latest": "azure",
@@ -257,6 +261,7 @@ export const IMAGE_GEN_MODELS: ModelFamily[] = ["dall-e", "azure-dall-e", "gpt-i
 
 export const OPENAI_MODEL_FAMILY_MAP: { [regex: string]: OpenAIModelFamily } = {
   "^gpt-image(-\\d+)?(-preview)?(-\\d{4}-\\d{2}-\\d{2})?$": "gpt-image",
+  "^gpt-5\\.1(-\\d{4}-\\d{2}-\\d{2})?$": "gpt51",
   "^gpt-5(-\\d{4}-\\d{2}-\\d{2})?$": "gpt5",
   "^gpt-5-mini(-\\d{4}-\\d{2}-\\d{2})?$": "gpt5-mini",
   "^gpt-5-nano(-\\d{4}-\\d{2}-\\d{2})?$": "gpt5-nano",

src/shared/stats.ts

@@ -14,6 +14,8 @@ const MODEL_PRICING: Record<ModelFamily, { input: number; output: number } | und
   "azure-gpt41-nano": { input: 0.10, output: 0.40 },
   "gpt5": { input: 1.25, output: 10.00 },
   "azure-gpt5": { input: 1.25, output: 10.00 },
+  "gpt51": { input: 1.25, output: 10.00 },
+  "azure-gpt51": { input: 1.25, output: 10.00 },
   "gpt5-mini": { input: 0.25, output: 2.00 },
   "azure-gpt5-mini": { input: 0.25, output: 2.00 },
   "gpt5-nano": { input: 0.05, output: 0.40 },