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feat(models): add Gemini 3.5 Flash Lite and 3.1 Flash Lite to Gemini API provider #1334

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Merged
taltas merged 3 commits into from
Aug 22, 2026
Merged

feat(models): add Gemini 3.5 Flash Lite and 3.1 Flash Lite to Gemini API provider #1334

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c437ddf
feat(models): add Gemini 3.5 Flash Lite and 3.1 Flash Lite to Gemini …
easonliang28 Aug 21, 2026
e63c432
fix(models): support minimal thinking level for Gemini 3.1 Flash Lite
easonliang28 Aug 21, 2026
401c56f
fix(models): default Flash Lite reasoning effort to minimal
easonliang28 Aug 21, 2026
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31 changes: 31 additions & 0 deletions packages/types/src/__tests__/google-models.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -10,3 +10,34 @@ 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"]
expect(model.supportsReasoningEffort).toEqual(["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)
})
28 changes: 28 additions & 0 deletions packages/types/src/providers/gemini.ts
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Expand Up @@ -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: ["low", "medium", "high"],
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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,
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