fix: update model catalog — gpt-5.4/5.3-codex removed, gpt-5.2-codex is new flagship

Backend dropped gpt-5.4, gpt-5.3-codex, gpt-5.3-codex-spark.
New model list: gpt-5.2-codex (default), gpt-5.2, gpt-5.1-codex-max,
gpt-5.1-codex, gpt-5.1, gpt-5-codex, gpt-5, gpt-oss-120b, gpt-oss-20b,
gpt-5.1-codex-mini, gpt-5-codex-mini.

- config/default.yaml: default model → gpt-5.2-codex
- config/models.yaml: full rewrite matching backend /codex/models response
- model-store.ts: isCodexCompatibleId() now matches gpt-oss-*,
normalizeBackendModel() handles supported_reasoning_levels + effort key
- codex-api.ts: getModels() adds ?client_version= (now required by backend)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config/default.yaml

@@ -9,7 +9,7 @@ client:
   arch: arm64
   chromium_version: "144"
 model:
-  default: gpt-5.4
+  default: gpt-5.2-codex
   default_reasoning_effort: medium
   default_service_tier: null
   suppress_desktop_directives: true

config/models.yaml

@@ -2,294 +2,163 @@
 #
 # Sources:
 #   1. Static (below) — Codex-specific models (not returned by /backend-api/models)
-#   2. Dynamic          — general ChatGPT models fetched from /backend-api/models
+#   2. Dynamic          — general ChatGPT models fetched from /backend-api/codex/models
 #
 # Dynamic fetch merges with static; backend entries win for shared IDs.
+# Models endpoint now requires ?client_version= query parameter.
+#
+# Last updated: 2026-03-10 (backend removed gpt-5.4, gpt-5.3-codex family)
 
 models:
-  # ── GPT-5.4 ──────────────────────────────────────────────────────
-  - id: gpt-5.4
-    displayName: GPT-5.4
-    description: Latest Codex flagship model
+  # ── GPT-5.2 Codex (current flagship) ────────────────────────────────
+  - id: gpt-5.2-codex
+    displayName: GPT-5.2 Codex
+    description: Frontier agentic coding model
     isDefault: true
     supportedReasoningEfforts:
-      - { reasoningEffort: none,   description: "No reasoning" }
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-      - { reasoningEffort: xhigh,  description: "Extended deep reasoning" }
+      - { reasoningEffort: low,    description: "Fast responses with lighter reasoning" }
+      - { reasoningEffort: medium, description: "Balances speed and reasoning depth" }
+      - { reasoningEffort: high,   description: "Greater reasoning depth for complex problems" }
+      - { reasoningEffort: xhigh,  description: "Extra high reasoning depth" }
     defaultReasoningEffort: medium
     inputModalities: [text, image]
     supportsPersonality: true
     upgrade: null
 
-  # ── GPT-5.3 Codex family ──────────────────────────────────────────
-  - id: gpt-5.3-codex
-    displayName: GPT-5.3 Codex
-    description: Latest Codex flagship model
+  # ── GPT-5.2 (general-purpose) ────────────────────────────────────────
+  - id: gpt-5.2
+    displayName: GPT-5.2
+    description: Optimized for professional work and long-running agents
     isDefault: false
     supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
+      - { reasoningEffort: low,    description: "Balances speed with some reasoning" }
+      - { reasoningEffort: medium, description: "Solid balance of reasoning depth and latency" }
+      - { reasoningEffort: high,   description: "Maximizes reasoning depth" }
+      - { reasoningEffort: xhigh,  description: "Extra high reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.3-codex-high
-    displayName: GPT-5.3 Codex High
-    description: GPT-5.3 Codex — high reasoning tier
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-    defaultReasoningEffort: high
-    inputModalities: [text]
-    supportsPersonality: false
+    inputModalities: [text, image]
+    supportsPersonality: true
     upgrade: null
 
-  - id: gpt-5.3-codex-mid
-    displayName: GPT-5.3 Codex Mid
-    description: GPT-5.3 Codex — mid reasoning tier
+  # ── GPT-5.1 Codex family ──────────────────────────────────────────
+  - id: gpt-5.1-codex-max
+    displayName: GPT-5.1 Codex Max
+    description: GPT-5.1 Codex — extended context / deepest reasoning
     isDefault: false
     supportedReasoningEfforts:
+      - { reasoningEffort: low,    description: "Fast responses" }
       - { reasoningEffort: medium, description: "Balanced speed and quality" }
+      - { reasoningEffort: high,   description: "Deepest reasoning" }
+      - { reasoningEffort: xhigh,  description: "Extra high reasoning depth" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.3-codex-low
-    displayName: GPT-5.3 Codex Low
-    description: GPT-5.3 Codex — low reasoning tier (fastest)
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
+    inputModalities: [text, image]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.3-codex-max
-    displayName: GPT-5.3 Codex Max
-    description: GPT-5.3 Codex — extended context / deepest reasoning
+  - id: gpt-5.1-codex
+    displayName: GPT-5.1 Codex
+    description: GPT-5.1 Codex
     isDefault: false
     supportedReasoningEfforts:
       - { reasoningEffort: low,    description: "Fastest responses" }
       - { reasoningEffort: medium, description: "Balanced speed and quality" }
       - { reasoningEffort: high,   description: "Deepest reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.3-codex-mini
-    displayName: GPT-5.3 Codex Mini
-    description: GPT-5.3 Codex — lightweight, low-latency
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.3-codex-spark
-    displayName: GPT-5.3 Codex Spark
-    description: GPT-5.3 Codex — ultra-lightweight, lowest latency
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: minimal, description: "Minimal reasoning" }
-      - { reasoningEffort: low,     description: "Fastest responses" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
+    inputModalities: [text, image]
     supportsPersonality: false
     upgrade: null
 
-  # ── GPT-5.2 Codex family ──────────────────────────────────────────
-  - id: gpt-5.2-codex
-    displayName: GPT-5.2 Codex
-    description: GPT-5.2 Codex flagship
+  - id: gpt-5.1
+    displayName: GPT-5.1
+    description: General-purpose GPT-5.1
     isDefault: false
     supportedReasoningEfforts:
       - { reasoningEffort: low,    description: "Fastest responses" }
       - { reasoningEffort: medium, description: "Balanced speed and quality" }
       - { reasoningEffort: high,   description: "Deepest reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.2-codex-high
-    displayName: GPT-5.2 Codex High
-    description: GPT-5.2 Codex — high reasoning tier
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-    defaultReasoningEffort: high
-    inputModalities: [text]
+    inputModalities: [text, image]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.2-codex-mid
-    displayName: GPT-5.2 Codex Mid
-    description: GPT-5.2 Codex — mid reasoning tier
+  - id: gpt-5.1-codex-mini
+    displayName: GPT-5.1 Codex Mini
+    description: GPT-5.1 Codex Mini — lightweight, low-latency
     isDefault: false
     supportedReasoningEfforts:
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
+      - { reasoningEffort: medium, description: "Balanced" }
+      - { reasoningEffort: high,   description: "Greater reasoning" }
     defaultReasoningEffort: medium
     inputModalities: [text]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.2-codex-low
-    displayName: GPT-5.2 Codex Low
-    description: GPT-5.2 Codex — low reasoning tier (fastest)
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.2-codex-max
-    displayName: GPT-5.2 Codex Max
-    description: GPT-5.2 Codex — extended context / deepest reasoning
+  # ── GPT-5 Codex family ──────────────────────────────────────────────
+  - id: gpt-5-codex
+    displayName: GPT-5 Codex
+    description: GPT-5 Codex
     isDefault: false
     supportedReasoningEfforts:
       - { reasoningEffort: low,    description: "Fastest responses" }
       - { reasoningEffort: medium, description: "Balanced speed and quality" }
       - { reasoningEffort: high,   description: "Deepest reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.2-codex-mini
-    displayName: GPT-5.2 Codex Mini
-    description: GPT-5.2 Codex — lightweight, low-latency
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
+    inputModalities: [text, image]
     supportsPersonality: false
     upgrade: null
 
-  # ── GPT-5.1 Codex family ──────────────────────────────────────────
-  - id: gpt-5.1-codex
-    displayName: GPT-5.1 Codex
-    description: GPT-5.1 Codex
+  - id: gpt-5
+    displayName: GPT-5
+    description: General-purpose GPT-5
     isDefault: false
     supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
+      - { reasoningEffort: minimal, description: "Fastest responses with limited reasoning" }
+      - { reasoningEffort: low,     description: "Fast responses" }
+      - { reasoningEffort: medium,  description: "Balanced" }
+      - { reasoningEffort: high,    description: "Deepest reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.1-codex-high
-    displayName: GPT-5.1 Codex High
-    description: GPT-5.1 Codex — high reasoning tier
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-    defaultReasoningEffort: high
-    inputModalities: [text]
+    inputModalities: [text, image]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.1-codex-mid
-    displayName: GPT-5.1 Codex Mid
-    description: GPT-5.1 Codex — mid reasoning tier
+  - id: gpt-5-codex-mini
+    displayName: GPT-5 Codex Mini
+    description: GPT-5 Codex Mini — lightweight
     isDefault: false
     supportedReasoningEfforts:
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
+      - { reasoningEffort: medium, description: "Balanced" }
+      - { reasoningEffort: high,   description: "Greater reasoning" }
     defaultReasoningEffort: medium
     inputModalities: [text]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.1-codex-low
-    displayName: GPT-5.1 Codex Low
-    description: GPT-5.1 Codex — low reasoning tier (fastest)
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  - id: gpt-5.1-codex-max
-    displayName: GPT-5.1 Codex Max
-    description: GPT-5.1 Codex — extended context / deepest reasoning
+  # ── Open-source models ──────────────────────────────────────────────
+  - id: gpt-oss-120b
+    displayName: GPT-OSS 120B
+    description: Open-source 120B model
     isDefault: false
     supportedReasoningEfforts:
       - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
+      - { reasoningEffort: medium, description: "Balanced" }
       - { reasoningEffort: high,   description: "Deepest reasoning" }
     defaultReasoningEffort: medium
     inputModalities: [text]
     supportsPersonality: false
     upgrade: null
 
-  - id: gpt-5.1-codex-mini
-    displayName: GPT-5.1 Codex Mini
-    description: GPT-5.1 Codex Mini — lightweight, low-latency
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-    defaultReasoningEffort: low
-    inputModalities: [text]
-    supportsPersonality: false
-    upgrade: null
-
-  # ── Base GPT models (also usable via Codex endpoint) ───────────────
-  - id: gpt-5.3
-    displayName: GPT-5.3
-    description: General-purpose GPT-5.3
+  - id: gpt-oss-20b
+    displayName: GPT-OSS 20B
+    description: Open-source 20B model
     isDefault: false
     supportedReasoningEfforts:
       - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
+      - { reasoningEffort: medium, description: "Balanced" }
       - { reasoningEffort: high,   description: "Deepest reasoning" }
     defaultReasoningEffort: medium
-    inputModalities: [text, image]
-    supportsPersonality: true
-    upgrade: null
-
-  - id: gpt-5.2
-    displayName: GPT-5.2
-    description: General-purpose GPT-5.2
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-    defaultReasoningEffort: medium
-    inputModalities: [text, image]
-    supportsPersonality: true
-    upgrade: null
-
-  - id: gpt-5.1
-    displayName: GPT-5.1
-    description: General-purpose GPT-5.1
-    isDefault: false
-    supportedReasoningEfforts:
-      - { reasoningEffort: low,    description: "Fastest responses" }
-      - { reasoningEffort: medium, description: "Balanced speed and quality" }
-      - { reasoningEffort: high,   description: "Deepest reasoning" }
-    defaultReasoningEffort: medium
-    inputModalities: [text, image]
-    supportsPersonality: true
+    inputModalities: [text]
+    supportsPersonality: false
     upgrade: null
 
 aliases:
-  codex: "gpt-5.4"
+  codex: "gpt-5.2-codex"

src/models/model-store.ts

@@ -69,14 +69,25 @@ export interface BackendModelEntry {
   description?: string;
   is_default?: boolean;
   default_reasoning_effort?: string;
+  default_reasoning_level?: string;
   supported_reasoning_efforts?: Array<{
     reasoning_effort?: string;
     reasoningEffort?: string;
+    effort?: string;
+    description?: string;
+  }>;
+  supported_reasoning_levels?: Array<{
+    effort?: string;
     description?: string;
   }>;
   input_modalities?: string[];
   supports_personality?: boolean;
   upgrade?: string | null;
+  prefer_websockets?: boolean;
+  context_window?: number;
+  available_in_plans?: string[];
+  priority?: number;
+  visibility?: string;
 }
 
 /** Intermediate type with explicit efforts flag for merge logic. */
@@ -90,13 +101,21 @@ interface NormalizedModelWithMeta extends CodexModelInfo {
 function normalizeBackendModel(raw: BackendModelEntry): NormalizedModelWithMeta {
   const id = raw.slug ?? raw.id ?? raw.name ?? "unknown";
 
-  const hasExplicitEfforts = Array.isArray(raw.supported_reasoning_efforts) && raw.supported_reasoning_efforts.length > 0;
-
-  // Normalize reasoning efforts — accept both snake_case and camelCase
-  const efforts = (raw.supported_reasoning_efforts ?? []).map((e) => ({
-    reasoningEffort: e.reasoningEffort ?? e.reasoning_effort ?? "medium",
-    description: e.description ?? "",
-  }));
+  // Accept both old (supported_reasoning_efforts) and new (supported_reasoning_levels) field names
+  const rawEfforts = raw.supported_reasoning_efforts ?? [];
+  const rawLevels = raw.supported_reasoning_levels ?? [];
+  const hasExplicitEfforts = rawEfforts.length > 0 || rawLevels.length > 0;
+
+  // Normalize reasoning efforts — accept effort, reasoning_effort, reasoningEffort keys
+  const efforts = rawEfforts.length > 0
+    ? rawEfforts.map((e) => ({
+        reasoningEffort: e.reasoningEffort ?? e.reasoning_effort ?? e.effort ?? "medium",
+        description: e.description ?? "",
+      }))
+    : rawLevels.map((e) => ({
+        reasoningEffort: e.effort ?? "medium",
+        description: e.description ?? "",
+      }));
 
   return {
     id,
@@ -106,7 +125,7 @@ function normalizeBackendModel(raw: BackendModelEntry): NormalizedModelWithMeta
     supportedReasoningEfforts: efforts.length > 0
       ? efforts
       : [{ reasoningEffort: "medium", description: "Default" }],
-    defaultReasoningEffort: raw.default_reasoning_effort ?? "medium",
+    defaultReasoningEffort: raw.default_reasoning_effort ?? raw.default_reasoning_level ?? "medium",
     inputModalities: raw.input_modalities ?? ["text"],
     supportsPersonality: raw.supports_personality ?? false,
     upgrade: raw.upgrade ?? null,
@@ -115,10 +134,11 @@ function normalizeBackendModel(raw: BackendModelEntry): NormalizedModelWithMeta
   };
 }
 
-/** Check if a model ID is Codex-compatible (gpt-X.Y-codex-* or bare gpt-X.Y). */
+/** Check if a model ID is Codex-compatible (gpt-X.Y-codex-*, bare gpt-X.Y, or gpt-oss-*). */
 function isCodexCompatibleId(id: string): boolean {
   if (/^gpt-\d+(\.\d+)?-codex/.test(id)) return true;
   if (/^gpt-\d+(\.\d+)?$/.test(id)) return true;
+  if (/^gpt-oss-/.test(id)) return true;
   return false;
 }
 

src/proxy/codex-api.ts

@@ -146,8 +146,10 @@ export class CodexApi {
     const baseUrl = config.api.base_url;
 
     // Endpoints to probe (most specific first)
+    // /codex/models now requires ?client_version= query parameter
+    const clientVersion = config.client.app_version;
     const endpoints = [
-      `${baseUrl}/codex/models`,
+      `${baseUrl}/codex/models?client_version=${clientVersion}`,
       `${baseUrl}/models`,
       `${baseUrl}/sentinel/chat-requirements`,
     ];