From 985985e454044133967bb706db0b6d83f081d473 Mon Sep 17 00:00:00 2001
From: decolua <decoluadt@example.com>
Date: Fri, 20 Feb 2026 17:52:15 +0700
Subject: [PATCH] refactor: update Antigravity model configurations and pricing

---
 open-sse/config/providerModels.js               |  4 +---
 open-sse/services/usage.js                      |  5 +----
 open-sse/translator/request/openai-to-gemini.js | 10 ++++++++--
 src/shared/constants/cliTools.js                |  6 ++----
 src/shared/constants/pricing.js                 |  9 +--------
 5 files changed, 13 insertions(+), 21 deletions(-)

diff --git a/open-sse/config/providerModels.js b/open-sse/config/providerModels.js
index 12763fe..787685b 100644
--- a/open-sse/config/providerModels.js
+++ b/open-sse/config/providerModels.js
@@ -61,9 +61,7 @@ export const PROVIDER_MODELS = {
   ],
   ag: [  // Antigravity - special case: models call different backends
     { id: "claude-opus-4-6-thinking", name: "Claude Opus 4.6 Thinking" },
-    { id: "claude-opus-4-5-thinking", name: "Claude Opus 4.5 Thinking" },
-    { id: "claude-sonnet-4-5-thinking", name: "Claude Sonnet 4.5 Thinking" },
-    { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5" },
+    { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
     { id: "gemini-3-pro-high", name: "Gemini 3 Pro High" },
     { id: "gemini-3-pro-low", name: "Gemini 3 Pro Low" },
     { id: "gemini-3-flash", name: "Gemini 3 Flash" },
diff --git a/open-sse/services/usage.js b/open-sse/services/usage.js
index 8a34038..e6a44dd 100644
--- a/open-sse/services/usage.js
+++ b/open-sse/services/usage.js
@@ -245,10 +245,7 @@ async function getAntigravityUsage(accessToken, providerSpecificData) {
       // Filter only recommended/important models (must match PROVIDER_MODELS ag ids)
       const importantModels = [
         'claude-opus-4-6-thinking',
-        'claude-opus-4-5-thinking',
-        'claude-opus-4-5',
-        'claude-sonnet-4-5-thinking',
-        'claude-sonnet-4-5',
+        'claude-sonnet-4-6',
         'gemini-3-pro-high',
         'gemini-3-pro-low',
         'gemini-3-flash',
diff --git a/open-sse/translator/request/openai-to-gemini.js b/open-sse/translator/request/openai-to-gemini.js
index 103eddd..2874b39 100644
--- a/open-sse/translator/request/openai-to-gemini.js
+++ b/open-sse/translator/request/openai-to-gemini.js
@@ -384,12 +384,13 @@ function wrapInCloudCodeEnvelopeForClaude(model, claudeRequest, credentials = nu
     }
   }
 
-  // Add system instruction (Antigravity default - double injection)
+  // Add system instruction (Antigravity default - double injection + user system prompt)
   const systemParts = [
     { text: ANTIGRAVITY_DEFAULT_SYSTEM },
     { text: `Please ignore the following [ignore]${ANTIGRAVITY_DEFAULT_SYSTEM}[/ignore]` }
   ];
 
+  // Merge user system prompt from claudeRequest
   if (claudeRequest.system) {
     if (Array.isArray(claudeRequest.system)) {
       for (const block of claudeRequest.system) {
@@ -400,7 +401,12 @@ function wrapInCloudCodeEnvelopeForClaude(model, claudeRequest, credentials = nu
     }
   }
 
-  envelope.request.systemInstruction = { role: "user", parts: systemParts };
+  // Merge existing systemInstruction parts (from contents conversion)
+  if (envelope.request.systemInstruction?.parts) {
+    envelope.request.systemInstruction.parts.unshift(...systemParts);
+  } else {
+    envelope.request.systemInstruction = { role: "user", parts: systemParts };
+  }
 
   return envelope;
 }
diff --git a/src/shared/constants/cliTools.js b/src/shared/constants/cliTools.js
index b35865f..5c923b3 100644
--- a/src/shared/constants/cliTools.js
+++ b/src/shared/constants/cliTools.js
@@ -128,12 +128,10 @@ export const CLI_TOOLS = {
     color: "#4285F4",
     description: "Google Antigravity IDE with MITM",
     configType: "mitm",
-    modelAliases: ["claude-opus-4-5-thinking", "claude-sonnet-4-5-thinking", "claude-sonnet-4-5", "gemini-3-pro-high"],
+    modelAliases: ["claude-opus-4-6-thinking", "claude-sonnet-4-6-thinking", "gemini-3-pro-high"],
     defaultModels: [
-      { id: "claude-opus-4-5-thinking", name: "Claude Opus 4.5 Thinking", alias: "claude-opus-4-5-thinking" },
+      { id: "claude-opus-4-6-thinking", name: "Claude Opus 4.6 Thinking", alias: "claude-opus-4-6-thinking" },
       { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6", alias: "claude-sonnet-4-6" },
-      { id: "claude-sonnet-4-5-thinking", name: "Claude Sonnet 4.5 Thinking", alias: "claude-sonnet-4-5-thinking" },
-      { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5", alias: "claude-sonnet-4-5" },
       { id: "gemini-3-pro-high", name: "Gemini 3 Pro High", alias: "gemini-3-pro-high" },
       { id: "gemini-3-flash", name: "Gemini 3 Flash", alias: "gemini-3-flash" },
     ],
diff --git a/src/shared/constants/pricing.js b/src/shared/constants/pricing.js
index c7ff98f..22a9f47 100644
--- a/src/shared/constants/pricing.js
+++ b/src/shared/constants/pricing.js
@@ -335,14 +335,7 @@ export const DEFAULT_PRICING = {
       reasoning: 3.75,
       cache_creation: 0.30
     },
-    "claude-sonnet-4-5": {
-      input: 3.00,
-      output: 15.00,
-      cached: 0.30,
-      reasoning: 22.50,
-      cache_creation: 3.00
-    },
-    "claude-sonnet-4-5-thinking": {
+    "claude-sonnet-4-6": {
       input: 3.00,
       output: 15.00,
       cached: 0.30,