diff --git a/.changeset/exact-gpt-subscription.md b/.changeset/exact-gpt-subscription.md
new file mode 100644
index 0000000000..05332f513e
--- /dev/null
+++ b/.changeset/exact-gpt-subscription.md
@@ -0,0 +1,5 @@
+---
+"@kilocode/cli": patch
+---
+
+Exclude GPT-5.6 from models available through ChatGPT subscriptions while retaining access to variants such as GPT-5.6 Sol.
diff --git a/packages/opencode/src/plugin/openai/codex.ts b/packages/opencode/src/plugin/openai/codex.ts
index 262882669f..5a3a6fc9f9 100644
--- a/packages/opencode/src/plugin/openai/codex.ts
+++ b/packages/opencode/src/plugin/openai/codex.ts
@@ -29,7 +29,7 @@ const ALLOWED_MODELS = new Set([
   // kilocode_change end
 ])
 // kilocode_change start
-const DISALLOWED_MODELS = new Set(["gpt-5.5-pro"])
+const DISALLOWED_MODELS = new Set(["gpt-5.5-pro", "gpt-5.6"])
 // kilocode_change end
 
 interface PkceCodes {
diff --git a/packages/opencode/test/plugin/codex.test.ts b/packages/opencode/test/plugin/codex.test.ts
index a40b995358..a264bd376a 100644
--- a/packages/opencode/test/plugin/codex.test.ts
+++ b/packages/opencode/test/plugin/codex.test.ts
@@ -148,6 +148,14 @@ describe("plugin.codex", () => {
             id: "gpt-5.5",
             api: { id: "gpt-5.5" },
           } as never,
+          "gpt-5.6": {
+            id: "gpt-5.6",
+            api: { id: "gpt-5.6" },
+          } as never,
+          "gpt-5.6-sol": {
+            id: "gpt-5.6-sol",
+            api: { id: "gpt-5.6-sol" },
+          } as never,
           "gpt-5.4-mini": {
             id: "gpt-5.4-mini",
             api: { id: "gpt-5.4-mini" },
@@ -164,6 +172,8 @@ describe("plugin.codex", () => {
       } as never, { auth: { type: "oauth" } } as never)
       expect(provider).not.toHaveProperty(["gpt-5.5-pro"])
       expect(provider).toHaveProperty(["gpt-5.5"])
+      expect(provider).not.toHaveProperty(["gpt-5.6"])
+      expect(provider).toHaveProperty(["gpt-5.6-sol"])
       expect(provider).toHaveProperty(["gpt-5.4-mini"])
       expect(provider).toHaveProperty(["gpt-5.1-codex"])
       expect(provider).not.toHaveProperty(["other-model"])