diff --git a/rust/crates/api/src/lib.rs b/rust/crates/api/src/lib.rs
index b59437e8..6aad8d0b 100644
--- a/rust/crates/api/src/lib.rs
+++ b/rust/crates/api/src/lib.rs
@@ -20,8 +20,9 @@ pub use prompt_cache::{
 };
 pub use providers::anthropic::{AnthropicClient, AnthropicClient as ApiClient, AuthSource};
 pub use providers::openai_compat::{
-    build_chat_completion_request, flatten_tool_result_content, is_reasoning_model,
-    model_rejects_is_error_field, model_requires_reasoning_content_in_history, translate_message,
+    build_chat_completion_request, check_request_body_size, estimate_request_body_size,
+    flatten_tool_result_content, is_reasoning_model, model_rejects_is_error_field,
+    model_requires_reasoning_content_in_history, translate_message,
     OpenAiCompatClient, OpenAiCompatConfig,
 };
 pub use providers::{
diff --git a/rust/crates/api/src/providers/openai_compat.rs b/rust/crates/api/src/providers/openai_compat.rs
index ca028845..2eb7c56b 100644
--- a/rust/crates/api/src/providers/openai_compat.rs
+++ b/rust/crates/api/src/providers/openai_compat.rs
@@ -931,7 +931,7 @@ fn wire_model_for_base_url<'a>(
     }
 
     if matches!(lowered_prefix.as_str(), "xai" | "grok" | "qwen" | "kimi") {
-        return Cow::Borrowed(&model[pos + 1..]);
+        return Cow::Borrowed(strip_routing_prefix(model));
     }
 
     Cow::Borrowed(model)
@@ -2042,6 +2042,7 @@ mod tests {
             presence_penalty: Some(0.3),
             stop: Some(vec!["\n".to_string()]),
             reasoning_effort: None,
+            extra_body: BTreeMap::new(),
         };
         let payload = build_chat_completion_request(&request, OpenAiCompatConfig::openai());
         assert_eq!(payload["temperature"], 0.7);