diff --git a/dist/providers/openai-completions.js b/dist/providers/openai-completions.js
index 8c974317b88de3103d664c321e79bd6e6aa0f169..a7fab0dbd38256e840a91440c182d24c3108923d 100644
--- a/dist/providers/openai-completions.js
+++ b/dist/providers/openai-completions.js
@@ -335,6 +335,8 @@ function buildParams(model, context, options) {
     }
     if (context.tools) {
         params.tools = convertTools(context.tools, compat);
+        // Disable parallel tool calls for models that don't support them (e.g. Kimi K2.5)
+        params.parallel_tool_calls = false;
     }
     else if (hasToolHistory(context.messages)) {
         // Anthropic (via LiteLLM/proxy) requires tools param when conversation has tool_calls/tool_results