diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f16b1f735..eb01d1f6e1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ Docs: https://docs.openclaw.ai
 ### Changes
 
 - Agents: bump pi-mono packages to 0.52.5. (#9949) Thanks @gumadeiras.
+- Antigravity: update the default Antigravity OAuth model to `google-antigravity/claude-opus-4-6-thinking`. (#10720) Thanks @calvin-hpnet.
 - Memory: add native Voyage embeddings provider (including batching) for vector memory search. (#7078) Thanks @mcinteerj.
 - Models: default Anthropic model to `anthropic/claude-opus-4-6`. (#9853) Thanks @TinyTb.
 - Models/Onboarding: refresh provider defaults, update OpenAI/OpenAI Codex wizard defaults, and harden model allowlist initialization for first-time configs with matching docs/tests. (#9911) Thanks @gumadeiras.
diff --git a/docs/testing.md b/docs/testing.md
index 317f6ef961..da05ecf14f 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -227,7 +227,7 @@ Narrow, explicit allowlists are fastest and least flaky:
 
 - Google focus (Gemini API key + Antigravity):
   - Gemini (API key): `OPENCLAW_LIVE_GATEWAY_MODELS="google/gemini-3-flash-preview" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
-  - Antigravity (OAuth): `OPENCLAW_LIVE_GATEWAY_MODELS="google-antigravity/claude-opus-4-5-thinking,google-antigravity/gemini-3-pro-high" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
+  - Antigravity (OAuth): `OPENCLAW_LIVE_GATEWAY_MODELS="google-antigravity/claude-opus-4-6-thinking,google-antigravity/gemini-3-pro-high" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
 
 Notes:
 
@@ -250,12 +250,12 @@ This is the “common models” run we expect to keep working:
 - OpenAI Codex: `openai-codex/gpt-5.3-codex` (optional: `openai-codex/gpt-5.3-codex-codex`)
 - Anthropic: `anthropic/claude-opus-4-6` (or `anthropic/claude-sonnet-4-5`)
 - Google (Gemini API): `google/gemini-3-pro-preview` and `google/gemini-3-flash-preview` (avoid older Gemini 2.x models)
-- Google (Antigravity): `google-antigravity/claude-opus-4-5-thinking` and `google-antigravity/gemini-3-flash`
+- Google (Antigravity): `google-antigravity/claude-opus-4-6-thinking` and `google-antigravity/gemini-3-flash`
 - Z.AI (GLM): `zai/glm-4.7`
 - MiniMax: `minimax/minimax-m2.1`
 
 Run gateway smoke with tools + image:
-`OPENCLAW_LIVE_GATEWAY_MODELS="openai/gpt-5.2,openai-codex/gpt-5.3-codex,anthropic/claude-opus-4-6,google/gemini-3-pro-preview,google/gemini-3-flash-preview,google-antigravity/claude-opus-4-5-thinking,google-antigravity/gemini-3-flash,zai/glm-4.7,minimax/minimax-m2.1" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
+`OPENCLAW_LIVE_GATEWAY_MODELS="openai/gpt-5.2,openai-codex/gpt-5.3-codex,anthropic/claude-opus-4-6,google/gemini-3-pro-preview,google/gemini-3-flash-preview,google-antigravity/claude-opus-4-6-thinking,google-antigravity/gemini-3-flash,zai/glm-4.7,minimax/minimax-m2.1" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
 
 ### Baseline: tool calling (Read + optional Exec)
 
diff --git a/docs/zh-CN/testing.md b/docs/zh-CN/testing.md
index 224fbcf70f..4856ece03c 100644
--- a/docs/zh-CN/testing.md
+++ b/docs/zh-CN/testing.md
@@ -234,7 +234,7 @@ OPENCLAW_LIVE_CLI_BACKEND=1 \
 
 - Google 专项（Gemini API 密钥 + Antigravity）：
   - Gemini（API 密钥）：`OPENCLAW_LIVE_GATEWAY_MODELS="google/gemini-3-flash-preview" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
-  - Antigravity（OAuth）：`OPENCLAW_LIVE_GATEWAY_MODELS="google-antigravity/claude-opus-4-5-thinking,google-antigravity/gemini-3-pro-high" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
+  - Antigravity（OAuth）：`OPENCLAW_LIVE_GATEWAY_MODELS="google-antigravity/claude-opus-4-6-thinking,google-antigravity/gemini-3-pro-high" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
 
 注意：
 
@@ -257,12 +257,12 @@ OPENCLAW_LIVE_CLI_BACKEND=1 \
 - OpenAI Codex：`openai-codex/gpt-5.2`（可选：`openai-codex/gpt-5.2-codex`）
 - Anthropic：`anthropic/claude-opus-4-5`（或 `anthropic/claude-sonnet-4-5`）
 - Google（Gemini API）：`google/gemini-3-pro-preview` 和 `google/gemini-3-flash-preview`（避免较旧的 Gemini 2.x 模型）
-- Google（Antigravity）：`google-antigravity/claude-opus-4-5-thinking` 和 `google-antigravity/gemini-3-flash`
+- Google（Antigravity）：`google-antigravity/claude-opus-4-6-thinking` 和 `google-antigravity/gemini-3-flash`
 - Z.AI（GLM）：`zai/glm-4.7`
 - MiniMax：`minimax/minimax-m2.1`
 
 运行带工具 + 图像的 Gateway 网关冒烟测试：
-`OPENCLAW_LIVE_GATEWAY_MODELS="openai/gpt-5.2,openai-codex/gpt-5.2,anthropic/claude-opus-4-5,google/gemini-3-pro-preview,google/gemini-3-flash-preview,google-antigravity/claude-opus-4-5-thinking,google-antigravity/gemini-3-flash,zai/glm-4.7,minimax/minimax-m2.1" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
+`OPENCLAW_LIVE_GATEWAY_MODELS="openai/gpt-5.2,openai-codex/gpt-5.2,anthropic/claude-opus-4-5,google/gemini-3-pro-preview,google/gemini-3-flash-preview,google-antigravity/claude-opus-4-6-thinking,google-antigravity/gemini-3-flash,zai/glm-4.7,minimax/minimax-m2.1" pnpm test:live src/gateway/gateway-models.profiles.live.test.ts`
 
 ### 基线：工具调用（Read + 可选 Exec）
 
diff --git a/extensions/google-antigravity-auth/index.ts b/extensions/google-antigravity-auth/index.ts
index 74f9406c48..19435dfcac 100644
--- a/extensions/google-antigravity-auth/index.ts
+++ b/extensions/google-antigravity-auth/index.ts
@@ -13,7 +13,7 @@ const REDIRECT_URI = "http://localhost:51121/oauth-callback";
 const AUTH_URL = "https://accounts.google.com/o/oauth2/v2/auth";
 const TOKEN_URL = "https://oauth2.googleapis.com/token";
 const DEFAULT_PROJECT_ID = "rising-fact-p41fc";
-const DEFAULT_MODEL = "google-antigravity/claude-opus-4-5-thinking";
+const DEFAULT_MODEL = "google-antigravity/claude-opus-4-6-thinking";
 
 const SCOPES = [
   "https://www.googleapis.com/auth/cloud-platform",
diff --git a/src/agents/pi-tools-agent-config.test.ts b/src/agents/pi-tools-agent-config.test.ts
index b3b0367af0..8fba398aee 100644
--- a/src/agents/pi-tools-agent-config.test.ts
+++ b/src/agents/pi-tools-agent-config.test.ts
@@ -148,7 +148,7 @@ describe("Agent-specific tool filtering", () => {
       workspaceDir: "/tmp/test-provider",
       agentDir: "/tmp/agent-provider",
       modelProvider: "google-antigravity",
-      modelId: "claude-opus-4-5-thinking",
+      modelId: "claude-opus-4-6-thinking",
     });
 
     const toolNames = tools.map((t) => t.name);
@@ -176,7 +176,7 @@ describe("Agent-specific tool filtering", () => {
       workspaceDir: "/tmp/test-provider-profile",
       agentDir: "/tmp/agent-provider-profile",
       modelProvider: "google-antigravity",
-      modelId: "claude-opus-4-5-thinking",
+      modelId: "claude-opus-4-6-thinking",
     });
 
     const toolNames = tools.map((t) => t.name);