diff --git a/lib/ruby_llm/providers/openai/chat.rb b/lib/ruby_llm/providers/openai/chat.rb
index 98151e0e6..9ed7e170b 100644
--- a/lib/ruby_llm/providers/openai/chat.rb
+++ b/lib/ruby_llm/providers/openai/chat.rb
@@ -21,10 +21,7 @@ def render_payload(messages, tools:, temperature:, model:, stream: false, schema
           # Only include temperature if it's not nil (some models don't accept it)
           payload[:temperature] = temperature unless temperature.nil?
 
-          if tools.any?
-            payload[:tools] = tools.map { |_, tool| tool_for(tool) }
-            payload[:tool_choice] = 'auto'
-          end
+          payload[:tools] = tools.map { |_, tool| tool_for(tool) } if tools.any?
 
           if schema
             # Use strict mode from schema if specified, default to true