From 6635540a6da79202039b2a5db36daf2a78a7dd1f Mon Sep 17 00:00:00 2001
From: diegosouzapw <diegosouzapw@users.noreply.github.com>
Date: Tue, 7 Apr 2026 23:04:52 -0300
Subject: [PATCH] fix: map max_output_tokens to max_tokens for strict
 openai-compatible providers (#994)

---
 open-sse/translator/helpers/openaiHelper.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/open-sse/translator/helpers/openaiHelper.ts b/open-sse/translator/helpers/openaiHelper.ts
index f3ae1c1ee4..bbc4995c35 100644
--- a/open-sse/translator/helpers/openaiHelper.ts
+++ b/open-sse/translator/helpers/openaiHelper.ts
@@ -106,6 +106,14 @@ export function filterToOpenAIFormat(body) {
   delete body.metadata;
   delete body.anthropic_version;
 
+  // Map max_output_tokens (from Vercel AI SDK) to max_tokens logic
+  if (body.max_output_tokens !== undefined) {
+    if (body.max_tokens === undefined) {
+      body.max_tokens = body.max_output_tokens;
+    }
+    delete body.max_output_tokens;
+  }
+
   // Normalize tools to OpenAI format (from Claude, Gemini, etc.)
   if (body.tools && Array.isArray(body.tools) && body.tools.length > 0) {
     body.tools = body.tools