From 841944c221ca3034fbe35916d9ea68ee03d67b63 Mon Sep 17 00:00:00 2001
From: boorluck <ymhtp.dev@gmail.com>
Date: Sun, 12 Jul 2026 15:38:31 +1000
Subject: [PATCH] fix: add GPT-5.6 to Codex OAuth models

---
 backend/cli/src/provider/provider.ts       | 39 ++++++++++++++--------
 backend/cli/test/provider/provider.test.ts | 15 +++++++++
 2 files changed, 41 insertions(+), 13 deletions(-)

diff --git a/backend/cli/src/provider/provider.ts b/backend/cli/src/provider/provider.ts
index 7a9a9bc9..1e4eaa80 100644
--- a/backend/cli/src/provider/provider.ts
+++ b/backend/cli/src/provider/provider.ts
@@ -42,6 +42,31 @@ import { ProviderTransform } from "./transform"
 export namespace Provider {
   const log = Log.create({ service: "provider" })
 
+  const CODEX_MODEL_IDS = new Set<string>([
+    "gpt-5.6",
+    "gpt-5-6",
+    "gpt-5.6-sol",
+    "gpt-5-6-sol",
+    "gpt-5.6-terra",
+    "gpt-5-6-terra",
+    "gpt-5.6-luna",
+    "gpt-5-6-luna",
+    "gpt-5.5",
+    "gpt-5-5",
+    "gpt-5.4",
+    "gpt-5-4",
+    "gpt-5.4-mini",
+    "gpt-5-4-mini",
+    "gpt-5.3-codex",
+    "gpt-5-3-codex",
+    "gpt-5.2",
+    "gpt-5-2",
+  ])
+
+  export function isCodexModel(modelID: string): boolean {
+    return CODEX_MODEL_IDS.has(modelID)
+  }
+
   function isGpt5OrLater(modelID: string): boolean {
     const match = /^gpt-(\d+)/.exec(modelID)
     if (!match) {
@@ -1095,22 +1120,10 @@ export namespace Provider {
       // snapshot normalizes dots to dashes (e.g. `gpt-5-5`) while the
       // OpenAI API expects dots (`gpt-5.5`). We pick up whichever the
       // snapshot ships and route it through the codex provider.
-      const codexModelIds = new Set<string>([
-        "gpt-5.5",
-        "gpt-5-5",
-        "gpt-5.4",
-        "gpt-5-4",
-        "gpt-5.4-mini",
-        "gpt-5-4-mini",
-        "gpt-5.3-codex",
-        "gpt-5-3-codex",
-        "gpt-5.2",
-        "gpt-5-2",
-      ])
       const baseOpenai = database["openai"]
       const codexModels: Record<string, (typeof baseOpenai.models)[string]> = {}
       for (const [id, model] of Object.entries(baseOpenai.models)) {
-        if (codexModelIds.has(id)) {
+        if (isCodexModel(id)) {
           codexModels[id] = {
             ...model,
             providerID: "openai-codex",
diff --git a/backend/cli/test/provider/provider.test.ts b/backend/cli/test/provider/provider.test.ts
index cfab1715..f44e3d60 100644
--- a/backend/cli/test/provider/provider.test.ts
+++ b/backend/cli/test/provider/provider.test.ts
@@ -35,6 +35,21 @@ import { Env } from "../../src/env"
 const SONNET = "claude-sonnet-4-6"
 const OPUS = "claude-opus-4-5"
 
+test("Codex OAuth allowlist includes the GPT-5.6 family", () => {
+  for (const id of [
+    "gpt-5.6",
+    "gpt-5-6",
+    "gpt-5.6-sol",
+    "gpt-5-6-sol",
+    "gpt-5.6-terra",
+    "gpt-5-6-terra",
+    "gpt-5.6-luna",
+    "gpt-5-6-luna",
+  ]) {
+    expect(Provider.isCodexModel(id)).toBe(true)
+  }
+})
+
 test("pinned catalog models are present in the seeded test fixture", async () => {
   await using tmp = await tmpdir({})
   await Instance.provide({