diff --git a/codex-rs/core/src/model_family.rs b/codex-rs/core/src/model_family.rs
index 93c12864d..5c5045fe4 100644
--- a/codex-rs/core/src/model_family.rs
+++ b/codex-rs/core/src/model_family.rs
@@ -173,18 +173,6 @@ pub fn find_family_for_model(slug: &str) -> Option<ModelFamily> {
             support_verbosity: true,
             truncation_policy: TruncationPolicy::Tokens(10_000),
         )
-    } else if slug.starts_with("gpt-5.1-codex-max") {
-        model_family!(
-            slug, slug,
-            supports_reasoning_summaries: true,
-            reasoning_summary_format: ReasoningSummaryFormat::Experimental,
-            base_instructions: GPT_5_1_CODEX_MAX_INSTRUCTIONS.to_string(),
-            apply_patch_tool_type: Some(ApplyPatchToolType::Freeform),
-            shell_type: ConfigShellToolType::ShellCommand,
-            supports_parallel_tool_calls: true,
-            support_verbosity: false,
-            truncation_policy: TruncationPolicy::Tokens(10_000),
-        )
 
     // Production models.
     } else if slug.starts_with("gpt-5.1-codex-max") {