diff --git a/plugins/codex/commands/rescue.md b/plugins/codex/commands/rescue.md
index 56de9555..2d610e7b 100644
--- a/plugins/codex/commands/rescue.md
+++ b/plugins/codex/commands/rescue.md
@@ -1,6 +1,6 @@
 ---
 description: Delegate investigation, an explicit fix request, or follow-up rescue work to the Codex rescue subagent
-argument-hint: "[--background|--wait] [--resume|--fresh] [--model <model|spark>] [--effort <none|minimal|low|medium|high|xhigh>] [what Codex should investigate, solve, or continue]"
+argument-hint: "[--background|--wait] [--resume|--fresh] [--model <model|spark>] [--effort <none|minimal|low|medium|high|xhigh|max|ultra>] [what Codex should investigate, solve, or continue]"
 allowed-tools: Bash(node:*), AskUserQuestion, Agent
 ---
 
diff --git a/plugins/codex/scripts/codex-companion.mjs b/plugins/codex/scripts/codex-companion.mjs
index 83df468a..72f6f96b 100644
--- a/plugins/codex/scripts/codex-companion.mjs
+++ b/plugins/codex/scripts/codex-companion.mjs
@@ -68,7 +68,7 @@ const ROOT_DIR = path.resolve(fileURLToPath(new URL("..", import.meta.url)));
 const REVIEW_SCHEMA = path.join(ROOT_DIR, "schemas", "review-output.schema.json");
 const DEFAULT_STATUS_WAIT_TIMEOUT_MS = 240000;
 const DEFAULT_STATUS_POLL_INTERVAL_MS = 2000;
-const VALID_REASONING_EFFORTS = new Set(["none", "minimal", "low", "medium", "high", "xhigh"]);
+const VALID_REASONING_EFFORTS = new Set(["none", "minimal", "low", "medium", "high", "xhigh", "max", "ultra"]);
 const MODEL_ALIASES = new Map([["spark", "gpt-5.3-codex-spark"]]);
 const STOP_REVIEW_TASK_MARKER = "Run a stop-gate review of the previous Claude turn.";
 
@@ -79,7 +79,7 @@ function printUsage() {
       "  node scripts/codex-companion.mjs setup [--enable-review-gate|--disable-review-gate] [--json]",
       "  node scripts/codex-companion.mjs review [--wait|--background] [--base <ref>] [--scope <auto|working-tree|branch>]",
       "  node scripts/codex-companion.mjs adversarial-review [--wait|--background] [--base <ref>] [--scope <auto|working-tree|branch>] [focus text]",
-      "  node scripts/codex-companion.mjs task [--background] [--write] [--resume-last|--resume|--fresh] [--model <model|spark>] [--effort <none|minimal|low|medium|high|xhigh>] [prompt]",
+      "  node scripts/codex-companion.mjs task [--background] [--write] [--resume-last|--resume|--fresh] [--model <model|spark>] [--effort <none|minimal|low|medium|high|xhigh|max|ultra>] [prompt]",
       "  node scripts/codex-companion.mjs transfer [--source <claude-jsonl>] [--json]",
       "  node scripts/codex-companion.mjs status [job-id] [--all] [--json]",
       "  node scripts/codex-companion.mjs result [job-id] [--json]",
@@ -121,7 +121,7 @@ function normalizeReasoningEffort(effort) {
   }
   if (!VALID_REASONING_EFFORTS.has(normalized)) {
     throw new Error(
-      `Unsupported reasoning effort "${effort}". Use one of: none, minimal, low, medium, high, xhigh.`
+      `Unsupported reasoning effort "${effort}". Use one of: none, minimal, low, medium, high, xhigh, max, ultra.`
     );
   }
   return normalized;
diff --git a/plugins/codex/skills/codex-cli-runtime/SKILL.md b/plugins/codex/skills/codex-cli-runtime/SKILL.md
index 0e91bfb5..03354112 100644
--- a/plugins/codex/skills/codex-cli-runtime/SKILL.md
+++ b/plugins/codex/skills/codex-cli-runtime/SKILL.md
@@ -32,7 +32,7 @@ Command selection:
 - If the forwarded request includes `--fresh`, strip that token from the task text and do not add `--resume-last`.
 - `--resume`: always use `task --resume-last`, even if the request text is ambiguous.
 - `--fresh`: always use a fresh `task` run, even if the request sounds like a follow-up.
-- `--effort`: accepted values are `none`, `minimal`, `low`, `medium`, `high`, `xhigh`.
+- `--effort`: accepted values are `none`, `minimal`, `low`, `medium`, `high`, `xhigh`, `max`, `ultra`. `max` and `ultra` require a model that supports them, such as `gpt-5.6-sol`.
 - `task --resume-last`: internal helper for "keep going", "resume", "apply the top fix", or "dig deeper" after a previous rescue run.
 
 Safety rules:
diff --git a/tests/commands.test.mjs b/tests/commands.test.mjs
index c34b0605..346ed2e8 100644
--- a/tests/commands.test.mjs
+++ b/tests/commands.test.mjs
@@ -104,7 +104,7 @@ test("rescue command absorbs continue semantics", () => {
   assert.match(rescue, /--background\|--wait/);
   assert.match(rescue, /--resume\|--fresh/);
   assert.match(rescue, /--model <model\|spark>/);
-  assert.match(rescue, /--effort <none\|minimal\|low\|medium\|high\|xhigh>/);
+  assert.match(rescue, /--effort <none\|minimal\|low\|medium\|high\|xhigh\|max\|ultra>/);
   assert.match(rescue, /task-resume-candidate --json/);
   assert.match(rescue, /AskUserQuestion/);
   assert.match(rescue, /Continue current Codex thread/);
@@ -150,7 +150,7 @@ test("rescue command absorbs continue semantics", () => {
   assert.match(runtimeSkill, /Map `spark` to `--model gpt-5\.3-codex-spark`/i);
   assert.match(runtimeSkill, /If the forwarded request includes `--background` or `--wait`, treat that as Claude-side execution control only/i);
   assert.match(runtimeSkill, /Strip it before calling `task`/i);
-  assert.match(runtimeSkill, /`--effort`: accepted values are `none`, `minimal`, `low`, `medium`, `high`, `xhigh`/i);
+  assert.match(runtimeSkill, /`--effort`: accepted values are `none`, `minimal`, `low`, `medium`, `high`, `xhigh`, `max`, `ultra`/i);
   assert.match(runtimeSkill, /Do not inspect the repository, read files, grep, monitor progress, poll status, fetch results, cancel jobs, summarize output, or do any follow-up work of your own/i);
   assert.match(runtimeSkill, /If the Bash call fails or Codex cannot be invoked, return nothing/i);
   assert.match(readme, /`codex:codex-rescue` subagent/i);