diff --git a/docs/my-website/docs/proxy/config_settings.md b/docs/my-website/docs/proxy/config_settings.md
index d7542fc2c3d..22fc0d3e917 100644
--- a/docs/my-website/docs/proxy/config_settings.md
+++ b/docs/my-website/docs/proxy/config_settings.md
@@ -813,6 +813,7 @@ router_settings:
 | LITELLM_MODE | Operating mode for LiteLLM (e.g., production, development)
 | LITELLM_NON_ROOT | Flag to run LiteLLM in non-root mode for enhanced security in Docker containers
 | LITELLM_RATE_LIMIT_WINDOW_SIZE | Rate limit window size for LiteLLM. Default is 60
+| LITELLM_DISABLE_DEFAULT_REASONING_SUMMARY | If set to "true", disables automatic default reasoning summary injection (`summary: "detailed"`) for Anthropic experimental pass-through translations. Default is "false"
 | LITELLM_REASONING_AUTO_SUMMARY | If set to "true", automatically enables detailed reasoning summaries for reasoning models (e.g., o1, o3-mini, deepseek-reasoner). When enabled, adds `summary: "detailed"` to reasoning effort configurations. Default is "false"
 | LITELLM_SALT_KEY | Salt key for encryption in LiteLLM
 | LITELLM_SSL_CIPHERS | SSL/TLS cipher configuration for faster handshakes. Controls cipher suite preferences for OpenSSL connections.