diff --git a/README.md b/README.md
index 572210c..3c83813 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@ process.stdout.write("\n");
 | `CodexTokens`, `FetchLike`                                 | Types.                                                                                                               |
 | `CODEX_PROVIDER`                                           | The `"codex"` provider id.                                                                                           |
 | `CODEX_BASE_URL`, `CODEX_RESPONSES_PATH`                   | `https://chatgpt.com/backend-api` and `/codex/responses`.                                                            |
+| `CODEX_DEFAULT_MODELS`                                     | The models the Codex CLI's bundled catalog lists in its picker.                                                      |
 | `CODEX_ACCOUNT_ID_OPTION`                                  | `providerOptions` key sent as the `chatgpt-account-id` header.                                                       |
 | `CODEX_SESSION_ID_OPTION`                                  | `providerOptions` key sent as `prompt_cache_key` and the `session_id` header.                                        |
 | `CODEX_REASONING_EFFORT_OPTION`                            | `providerOptions` key sent as `reasoning.effort`; `"none"` omits it.                                                 |
diff --git a/src/constants.ts b/src/constants.ts
index c336635..c27121b 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -62,6 +62,20 @@ export const CODEX_AUTHORIZE_EXTRA_PARAMS: Record<string, string> = {
 export const CODEX_BASE_URL = "https://chatgpt.com/backend-api";
 export const CODEX_RESPONSES_PATH = "/codex/responses";
 
+// The models the Codex CLI's bundled catalog lists in its picker
+// (openai/codex@b1e72963c3, codex-rs/models-manager/models.json, visibility
+// "list"), by priority.
+export const CODEX_DEFAULT_MODELS = [
+  "gpt-6.1-sol",
+  "gpt-6-astra",
+  "gpt-6-sol",
+  "gpt-6-luna",
+  "gpt-5.6-sol",
+  "gpt-5.6-terra",
+  "gpt-5.6-luna",
+  "gpt-5.5",
+] as const;
+
 // Refresh a token this many milliseconds before its stated expiry so a
 // request is never sent with a token about to lapse mid-flight.
 export const CODEX_REFRESH_SKEW_MS = 60_000;