fix(provider): force openai reasoning variants (#34702)

packages/opencode/src/provider/transform.ts

@@ -1263,6 +1263,16 @@ const SLUG_OVERRIDES: Record<string, string> = {
 }
 
 export function providerOptions(model: Provider.Model, options: { [x: string]: any }) {
+  const usesOpenAIReasoningGate =
+    model.api.npm === "@ai-sdk/openai" ||
+    model.api.npm === "@ai-sdk/azure" ||
+    model.api.npm === "@ai-sdk/amazon-bedrock/mantle"
+  const normalized =
+    usesOpenAIReasoningGate &&
+    (model.capabilities.reasoning || options.reasoningEffort !== undefined || options.reasoningSummary !== undefined)
+      ? { ...options, forceReasoning: true }
+      : options
+
   if (model.api.npm === "@ai-sdk/gateway") {
     // Gateway providerOptions are split across two namespaces:
     // - `gateway`: gateway-native routing/caching controls (order, only, byok, etc.)
@@ -1272,8 +1282,8 @@ export function providerOptions(model: Provider.Model, options: { [x: string]: a
     const i = model.api.id.indexOf("/")
     const rawSlug = i > 0 ? model.api.id.slice(0, i) : undefined
     const slug = rawSlug ? (SLUG_OVERRIDES[rawSlug] ?? rawSlug) : undefined
-    const gateway = options.gateway
-    const rest = Object.fromEntries(Object.entries(options).filter(([k]) => k !== "gateway"))
+    const gateway = normalized.gateway
+    const rest = Object.fromEntries(Object.entries(normalized).filter(([k]) => k !== "gateway"))
     const has = Object.keys(rest).length > 0
 
     const result: Record<string, any> = {}
@@ -1307,9 +1317,9 @@ export function providerOptions(model: Provider.Model, options: { [x: string]: a
   // providerOptions["openai"], but OpenAIResponsesLanguageModel checks
   // "azure" first. Pass both so model options work on either code path.
   if (model.api.npm === "@ai-sdk/azure") {
-    return { openai: options, azure: options }
+    return { openai: normalized, azure: normalized }
   }
-  return { [key]: options }
+  return { [key]: normalized }
 }
 
 export function maxOutputTokens(model: Provider.Model, outputTokenMax = OUTPUT_TOKEN_MAX): number {