diff --git a/codex-rs/core/src/flags.rs b/codex-rs/core/src/flags.rs
index 60201a3b..de693868 100644
--- a/codex-rs/core/src/flags.rs
+++ b/codex-rs/core/src/flags.rs
@@ -1,16 +1,6 @@
-use std::time::Duration;
-
 use env_flags::env_flags;
 
 env_flags! {
-    pub OPENAI_API_BASE: &str = "https://api.openai.com/v1";
-
-    /// Fallback when the provider-specific key is not set.
-    pub OPENAI_API_KEY: Option<&str> = None;
-    pub OPENAI_TIMEOUT_MS: Duration = Duration::from_millis(300_000), |value| {
-        value.parse().map(Duration::from_millis)
-    };
-
     /// Fixture path for offline tests (see client.rs).
     pub CODEX_RS_SSE_FIXTURE: Option<&str> = None;
 }