diff --git a/profiles/opencode.nix b/profiles/opencode.nix
index e5696fa..91270da 100644
--- a/profiles/opencode.nix
+++ b/profiles/opencode.nix
@@ -8,6 +8,10 @@
 		package = inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.opencode;
 		settings = {
 			theme = "catppuccin";
+			plugin = [
+				"oh-my-opencode"
+				"opencode-antigravity-auth@1.2.2"
+			];
 			instructions = [
 				"CLAUDE.md"
 				"AGENT.md"
@@ -37,8 +41,116 @@
 					'';
 				};
 			};
+			# Antigravity Google models (for opencode-antigravity-auth plugin)
+			provider = {
+				google = {
+					models = {
+						gemini-3-pro-high = {
+							name = "Gemini 3 Pro High (Antigravity)";
+							limit = {
+								context = 1048576;
+								output = 65535;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						gemini-3-pro-low = {
+							name = "Gemini 3 Pro Low (Antigravity)";
+							limit = {
+								context = 1048576;
+								output = 65535;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						gemini-3-flash = {
+							name = "Gemini 3 Flash (Antigravity)";
+							limit = {
+								context = 1048576;
+								output = 65536;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						claude-sonnet-4-5 = {
+							name = "Claude Sonnet 4.5 (Antigravity)";
+							limit = {
+								context = 200000;
+								output = 64000;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						claude-sonnet-4-5-thinking = {
+							name = "Claude Sonnet 4.5 Thinking (Antigravity)";
+							limit = {
+								context = 200000;
+								output = 64000;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						claude-opus-4-5-thinking = {
+							name = "Claude Opus 4.5 Thinking (Antigravity)";
+							limit = {
+								context = 200000;
+								output = 64000;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+						gpt-oss-120b-medium = {
+							name = "GPT-OSS 120B Medium (Antigravity)";
+							limit = {
+								context = 131072;
+								output = 32768;
+							};
+							modalities = {
+								input = ["text" "image" "pdf"];
+								output = ["text"];
+							};
+						};
+					};
+				};
+			};
 		};
 	};
+
+	# oh-my-opencode configuration
+	# - Disables built-in google_auth (using antigravity plugin instead)
+	# - Oracle uses Zen API (opencode/gpt-5.2) instead of ChatGPT subscription
+	# - Frontend/document/multimodal agents use Antigravity Gemini models
+	home.file.".config/opencode/oh-my-opencode.json".text = builtins.toJSON {
+		"$schema" = "https://raw.githubusercontent.com/code-yeongyu/oh-my-opencode/master/assets/oh-my-opencode.schema.json";
+		google_auth = false;
+		agents = {
+			oracle = {
+				model = "opencode/gpt-5.2";
+			};
+			frontend-ui-ux-engineer = {
+				model = "google/gemini-3-pro-high";
+			};
+			document-writer = {
+				model = "google/gemini-3-flash";
+			};
+			multimodal-looker = {
+				model = "google/gemini-3-flash";
+			};
+		};
+	};
+
 	home.sessionVariables = {
 		OPENCODE_EXPERIMENTAL_EXA = "true";
 	};