diff --git a/dist/index.js b/dist/index.js
index 942a0103fa4f21e30c1f8fa7dd29bfdb02800643..212e117d7a2d68579f1da1d4e9a7c1e3d76dbbf0 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -14577,7 +14577,7 @@ function createGitHubCopilotOpenAICompatible(options = {}) {
   };
   const getHeaders = () => (0, import_provider_utils16.withUserAgentSuffix)(headers, `opeoginni/github-copilot-openai-compatible/${VERSION}`);
   const createChatModel = (modelId) => {
-    if (modelId.includes("codex")) {
+    if (modelId.startsWith('gpt-5')) {
       return new OpenAIResponsesLanguageModel(modelId, {
         provider: `${options.name ?? "githubcopilot"}.responses`,
         headers: getHeaders,
diff --git a/dist/index.mjs b/dist/index.mjs
index 8d2134d189ae5d40eaa9a7feee3048faf1f60ae7..fc3e29d5c503be912a1259d29d3c9319d3e87f53 100644
--- a/dist/index.mjs
+++ b/dist/index.mjs
@@ -14613,7 +14613,7 @@ function createGitHubCopilotOpenAICompatible(options = {}) {
   };
   const getHeaders = () => withUserAgentSuffix(headers, `opeoginni/github-copilot-openai-compatible/${VERSION}`);
   const createChatModel = (modelId) => {
-    if (modelId.includes("codex")) {
+    if (modelId.startsWith('gpt-5')) {
       return new OpenAIResponsesLanguageModel(modelId, {
         provider: `${options.name ?? "githubcopilot"}.responses`,
         headers: getHeaders,