diff --git a/pkg/providers/openai_compat/provider.go b/pkg/providers/openai_compat/provider.go
index e8ff7b330..177204643 100644
--- a/pkg/providers/openai_compat/provider.go
+++ b/pkg/providers/openai_compat/provider.go
@@ -130,6 +130,7 @@ func NewProvider(apiKey, apiBase, proxy string, opts ...Option) *Provider {
 		}
 	}
 
+	// Default to "max_tokens" if no custom field is set, since most APIs use that.
 	if p.maxTokensField == "" {
 		p.maxTokensField = "max_tokens"
 	}