feat(models): add Gemini 3.5 Flash Lite and 3.1 Flash Lite to Gemini API provider

packages/types/src/__tests__/google-models.test.ts

@@ -10,3 +10,36 @@ describe.each([
 		expect(model.cacheWritesPrice).toBe(0.5)
 	})
 })
+
+describe.each([
+	["gemini-3.5-flash-lite", geminiModels["gemini-3.5-flash-lite"]],
+	["gemini-3.1-flash-lite", geminiModels["gemini-3.1-flash-lite"]],
+])("Gemini 3.x Flash Lite model %s", (_modelId, model) => {
+	it("is registered with the documented limits and multimodal support", () => {
+		expect(model.maxTokens).toBe(65_536)
+		expect(model.contextWindow).toBe(1_048_576)
+		expect(model.supportsImages).toBe(true)
+		expect(model.supportsPromptCache).toBe(true)
+		expect(model.supportsReasoningBudget).toBe(false)
+	})
+})
+
+it("exposes the documented thinking levels and pricing for Gemini 3.5 Flash Lite", () => {
+	const model = geminiModels["gemini-3.5-flash-lite"]
+	expect(model.supportsReasoningEffort).toEqual(["minimal", "low", "medium", "high"])
+	expect(model.inputPrice).toBe(0.3)
+	expect(model.outputPrice).toBe(2.5)
+	expect(model.cacheReadsPrice).toBe(0.03)
+	expect(model.cacheWritesPrice).toBe(1.0)
+})
+
+it("exposes the documented thinking levels and pricing for Gemini 3.1 Flash Lite", () => {
+	const model = geminiModels["gemini-3.1-flash-lite"]
+	// https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/gemini/3-1-flash-lite
+	// "choosing from minimal, low, medium, or high thinking levels"
+	expect(model.supportsReasoningEffort).toEqual(["minimal", "low", "medium", "high"])
+	expect(model.inputPrice).toBe(0.25)
+	expect(model.outputPrice).toBe(1.5)
+	expect(model.cacheReadsPrice).toBe(0.025)
+	expect(model.cacheWritesPrice).toBe(1.0)
+})

packages/types/src/providers/gemini.ts

@@ -145,6 +145,34 @@ export const geminiModels = {
 		outputPrice: 3.0,
 		cacheReadsPrice: 0.05,
 	},
+	// 3.x Flash Lite models
+	"gemini-3.5-flash-lite": {
+		maxTokens: 65_536,
+		contextWindow: 1_048_576,
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["minimal", "low", "medium", "high"],
+		reasoningEffort: "medium",
+		inputPrice: 0.3,
+		outputPrice: 2.5,
+		cacheReadsPrice: 0.03,
+		cacheWritesPrice: 1.0,
+		supportsReasoningBudget: false,
+	},
+	"gemini-3.1-flash-lite": {
+		maxTokens: 65_536,
+		contextWindow: 1_048_576,
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["minimal", "low", "medium", "high"],
+		reasoningEffort: "medium",
+		inputPrice: 0.25,
+		outputPrice: 1.5,
+		cacheReadsPrice: 0.025,
+		cacheWritesPrice: 1.0,
+		supportsReasoningBudget: false,
+	},
+
 	// 2.5 Pro models
 	"gemini-2.5-pro": {
 		maxTokens: 64_000,