feat(antigravity,gemini): add Gemini 3.8 Flash support and bump IDE fingerprint to 2.11.0

Co-authored-by: Schnee111 <daffamaarif.dev@gmail.com>
Co-authored-by: AhooraZen <ahoora935137@gmail.com>
Co-authored-by: anojndr <anojndr@gmail.com>
Co-authored-by: Emirhan <emirhan551952@gmail.com>
This commit is contained in:
Zafar
2026-09-03 09:12:52 +07:00
parent 1fe996db6a
commit 70f15aa50b
16 changed files with 235 additions and 14 deletions

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@@ -53,6 +53,9 @@ const PROVIDER_MODELS = {
{ id: "glm-4.7" },
],
ag: [
{ id: "gemini-3.8-flash-high" },
{ id: "gemini-3.8-flash-medium" },
{ id: "gemini-3.8-flash-low" },
{ id: "gemini-3.7-flash-high" },
{ id: "gemini-3.7-flash-medium" },
{ id: "gemini-3.7-flash-low" },
@@ -101,6 +104,8 @@ const PROVIDER_MODELS = {
{ id: "claude-3-5-sonnet-20241022" },
],
gemini: [
{ id: "gemini-3.8-flash" },
{ id: "gemini-3.7-flash" },
{ id: "gemini-3.6-flash" },
{ id: "gemini-3.5-flash-lite" },
{ id: "gemini-3-pro-preview" },

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@@ -226,6 +226,7 @@ export const PATTERN_CAPABILITIES = [
// ── Gemini (all 2.0+ multimodal + google_search grounding, 1M ctx) ─
{ pattern: "*gemini*image*", caps: { vision: true, imageOutput: true, contextWindow: 1048576 } },
{ pattern: "*gemini-3.8*", caps: { vision: true, audioInput: true, videoInput: true, reasoning: true, search: true, thinkingFormat: "gemini-level", thinkingCanDisable: false, contextWindow: 1048576, maxOutput: 65536 } },
{ pattern: "*gemini-3.7*", caps: { vision: true, audioInput: true, videoInput: true, reasoning: true, search: true, thinkingFormat: "gemini-level", thinkingCanDisable: false, contextWindow: 1048576, maxOutput: 65536 } },
{ pattern: "*gemini-3*pro*", caps: { vision: true, audioInput: true, videoInput: true, reasoning: true, search: true, thinkingFormat: "gemini-level", thinkingCanDisable: false, contextWindow: 1048576, maxOutput: 65535 } },
{ pattern: "*gemini-3*", caps: { vision: true, audioInput: true, videoInput: true, reasoning: true, search: true, thinkingFormat: "gemini-level", thinkingCanDisable: false, contextWindow: 1048576, maxOutput: 65536 } },

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@@ -57,6 +57,10 @@ export const MODEL_PRICING = {
"o1-mini": { input: 3.00, output: 12.00, cached: 1.50, reasoning: 18.00, cache_creation: 3.00 },
// === Gemini ===
"gemini-3.8-flash": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.8-flash-high": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.8-flash-medium": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.8-flash-low": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.7-flash": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.7-flash-high": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },
"gemini-3.7-flash-medium": { input: 1.50, output: 7.50, cached: 0.15, reasoning: 11.25, cache_creation: 1.875 },

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@@ -36,8 +36,7 @@ export default {
},
},
usage: {
// Discovery (quota/project) on PROD; daily host rejects these.
quotaApiUrl: "https://cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels",
quotaApiUrl: `${ANTIGRAVITY_IDE_BASE_URL}/v1internal:fetchAvailableModels`,
loadProjectApiUrl: "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
tokenUrl: "https://oauth2.googleapis.com/token",
},
@@ -45,6 +44,10 @@ export default {
clientSecret: "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",
},
models: [
{ id: "gemini-3.8-flash-high", name: "Gemini 3.8 Flash (High)", upstreamModelId: "gemini-3.8-flash-high(high)" },
{ id: "gemini-3.8-flash-medium", name: "Gemini 3.8 Flash (Medium)", upstreamModelId: "gemini-3.8-flash-medium(medium)" },
{ id: "gemini-3.8-flash-low", name: "Gemini 3.8 Flash (Low)", upstreamModelId: "gemini-3.8-flash-low(low)" },
{ id: "gemini-3.8-flash", name: "Gemini 3.8 Flash", upstreamModelId: "gemini-3.8-flash-medium(medium)" },
{ id: "gemini-3.7-flash-high", name: "Gemini 3.7 Flash (High)", upstreamModelId: "gemini-3.7-flash-tiered(high)" },
{ id: "gemini-3.7-flash-medium", name: "Gemini 3.7 Flash (Medium)", upstreamModelId: "gemini-3.7-flash-tiered(medium)" },
{ id: "gemini-3.7-flash-low", name: "Gemini 3.7 Flash (Low)", upstreamModelId: "gemini-3.7-flash-tiered(low)" },

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@@ -36,6 +36,7 @@ export default {
},
},
models: [
{ id: "gemini-3.8-flash", name: "Gemini 3.8 Flash" },
{ id: "gemini-3.7-flash", name: "Gemini 3.7 Flash" },
{ id: "gemini-3.6-flash", name: "Gemini 3.6 Flash" },
{ id: "gemini-3.5-flash-lite", name: "Gemini 3.5 Flash Lite" },

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@@ -75,10 +75,10 @@ export const KIMI_CODING_BASE_URL = "https://api.kimi.com/coding/v1/messages";
export const OPENAI_COMPAT_BASE = "https://api.openai.com/v1";
export const ANTHROPIC_COMPAT_BASE = "https://api.anthropic.com/v1";
// Official Antigravity IDE Desktop 2.1.1 fingerprint captured from macOS arm64.
// Official Antigravity IDE Desktop 2.11.0 fingerprint captured from macOS arm64.
// Keep this static even when 9router runs on Linux: the provider profile is
// intentionally matching the IDE client, not the server host.
export const ANTIGRAVITY_IDE_VERSION = "2.1.1";
export const ANTIGRAVITY_IDE_VERSION = "2.11.0";
export const ANTIGRAVITY_IDE_BASE_URL = "https://daily-cloudcode-pa.googleapis.com";
export const ANTIGRAVITY_IDE_USER_AGENT = `antigravity/ide/${ANTIGRAVITY_IDE_VERSION} darwin/arm64`;

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@@ -161,6 +161,9 @@ export async function getAntigravityUsage(accessToken, providerSpecificData, pro
if (data.models) {
// Filter only recommended/important models (must match PROVIDER_MODELS ag ids)
const importantModels = [
'gemini-3.8-flash-high',
'gemini-3.8-flash-medium',
'gemini-3.8-flash-low',
'gemini-3.7-flash-high',
'gemini-3.7-flash-medium',
'gemini-3.7-flash-low',

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@@ -4,7 +4,7 @@
// backend accepts them. Catalog and other passthrough requests retain the
// client's current identity. Hardcoded MVP — toggle/version configurable later.
const ANTIGRAVITY_IDE_VERSION = "1.23.2";
const ANTIGRAVITY_IDE_VERSION = "2.11.0";
const ANTIGRAVITY_IDE_VERSION_OVERRIDE_ENABLED = true;
function shouldRewriteMetadata(metadata) {

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@@ -55,7 +55,11 @@ const MODEL_SYNONYMS = {
"gemini-3.5-flash-high": "gemini-3-flash-agent",
"gemini-3.5-flash-medium": "gemini-3.5-flash-low",
"gemini-3.5-flash-extra-low": "gemini-3.5-flash-extra-low",
"gemini-3.7-flash-high": "gemini-3.7-flash-high",
"gemini-3.8-flash": "gemini-3.8-flash-medium",
"gemini-3.8-flash-high": "gemini-3.8-flash-high",
"gemini-3.8-flash-medium": "gemini-3.8-flash-medium",
"gemini-3.8-flash-low": "gemini-3.8-flash-low",
"gemini-3.7-flash-high": "gemini-3.7-flash-high",
"gemini-3.7-flash-medium": "gemini-3.7-flash-medium",
"gemini-3.7-flash-low": "gemini-3.7-flash-low",
"gemini-3.1-pro-high": "gemini-pro-agent",
@@ -135,8 +139,8 @@ function extractModel(url, body) {
}
const model = urlModel || parsed.model || null;
const cleanModelName = String(model).replace(/^models\//, "");
if (cleanModelName === "gemini-3.6-flash-tiered" || cleanModelName === "gemini-3.7-flash-tiered") {
const ver = cleanModelName.includes("3.7") ? "3.7" : "3.6";
if (cleanModelName === "gemini-3.6-flash-tiered" || cleanModelName === "gemini-3.7-flash-tiered" || cleanModelName === "gemini-3.8-flash-tiered") {
const ver = cleanModelName.includes("3.8") ? "3.8" : cleanModelName.includes("3.7") ? "3.7" : "3.6";
const rawLevel = parsed.request?.generationConfig?.thinkingConfig?.thinkingLevel
|| parsed.generationConfig?.thinkingConfig?.thinkingLevel;
const level = ["high", "medium", "low"].includes(String(rawLevel).toLowerCase())

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@@ -8,8 +8,11 @@ export const MITM_TOOLS = {
description: "Google Antigravity IDE with MITM",
configType: "mitm",
mitmDomain: "daily-cloudcode-pa.googleapis.com",
modelAliases: ["gemini-3.7-flash-high", "gemini-3.7-flash-medium", "gemini-3.7-flash-low", "gemini-3.6-flash-high", "gemini-3.6-flash-medium", "gemini-3.6-flash-low", "gemini-3.5-flash-low", "gemini-3-flash-agent", "gemini-3.5-flash-extra-low", "gemini-3.1-pro-low", "gemini-pro-agent", "claude-sonnet-4-6", "claude-opus-4-6-thinking", "gpt-oss-120b-medium", "gemini-3-flash"],
modelAliases: ["gemini-3.8-flash-high", "gemini-3.8-flash-medium", "gemini-3.8-flash-low", "gemini-3.7-flash-high", "gemini-3.7-flash-medium", "gemini-3.7-flash-low", "gemini-3.6-flash-high", "gemini-3.6-flash-medium", "gemini-3.6-flash-low", "gemini-3.5-flash-low", "gemini-3-flash-agent", "gemini-3.5-flash-extra-low", "gemini-3.1-pro-low", "gemini-pro-agent", "claude-sonnet-4-6", "claude-opus-4-6-thinking", "gpt-oss-120b-medium", "gemini-3-flash"],
defaultModels: [
{ id: "gemini-3.8-flash-high", name: "Gemini 3.8 Flash (High)", alias: "gemini-3.8-flash-high" },
{ id: "gemini-3.8-flash-medium", name: "Gemini 3.8 Flash (Medium)", alias: "gemini-3.8-flash-medium" },
{ id: "gemini-3.8-flash-low", name: "Gemini 3.8 Flash (Low)", alias: "gemini-3.8-flash-low" },
{ id: "gemini-3.7-flash-high", name: "Gemini 3.7 Flash (High)", alias: "gemini-3.7-flash-high" },
{ id: "gemini-3.7-flash-medium", name: "Gemini 3.7 Flash (Medium)", alias: "gemini-3.7-flash-medium" },
{ id: "gemini-3.7-flash-low", name: "Gemini 3.7 Flash (Low)", alias: "gemini-3.7-flash-low" },

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@@ -29,7 +29,7 @@
],
"format": "antigravity",
"headers": {
"User-Agent": "antigravity/ide/2.1.1 darwin/arm64"
"User-Agent": "antigravity/ide/2.11.0 darwin/arm64"
},
"retry": {
"429": {
@@ -43,7 +43,7 @@
}
},
"usage": {
"quotaApiUrl": "https://cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels",
"quotaApiUrl": "https://daily-cloudcode-pa.googleapis.com/v1internal:fetchAvailableModels",
"loadProjectApiUrl": "https://cloudcode-pa.googleapis.com/v1internal:loadCodeAssist",
"tokenUrl": "https://oauth2.googleapis.com/token"
},

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@@ -0,0 +1,61 @@
import { describe, expect, it, vi, beforeEach } from "vitest";
const proxyAwareFetch = vi.fn(async (url) => ({
ok: true,
status: 200,
json: async () => url.includes(":loadCodeAssist")
? { cloudaicompanionProject: "project-1", currentTier: { name: "Pro" } }
: {
models: {
"gemini-3.8-flash-high": {
displayName: "Gemini 3.8 Flash (High)",
quotaInfo: { remainingFraction: 0.85, resetTime: "2026-08-25T12:00:00Z" },
},
"gemini-3.8-flash-medium": {
displayName: "Gemini 3.8 Flash (Medium)",
quotaInfo: { remainingFraction: 0.6, resetTime: "2026-08-25T12:00:00Z" },
},
"gemini-3.8-flash-low": {
displayName: "Gemini 3.8 Flash (Low)",
quotaInfo: { remainingFraction: 0.35, resetTime: "2026-08-25T12:00:00Z" },
},
"internal-model": {
displayName: "Internal",
isInternal: true,
quotaInfo: { remainingFraction: 0.5 },
},
},
},
text: async () => "{}",
}));
vi.mock("../../open-sse/utils/proxyFetch.js", () => ({
proxyAwareFetch,
}));
describe("Antigravity quota tracker: Gemini 3.8 Flash usage bars", () => {
beforeEach(() => proxyAwareFetch.mockClear());
it("returns Gemini 3.8 Flash tier quotas so the dashboard can render usage bars", async () => {
const { getAntigravityUsage } = await import("../../open-sse/services/usage/google.js");
const usage = await getAntigravityUsage("access-token", {});
expect(usage.quotas["gemini-3.8-flash-high"]).toMatchObject({
used: 150,
total: 1000,
remainingPercentage: 85,
displayName: "Gemini 3.8 Flash (High)",
});
expect(usage.quotas["gemini-3.8-flash-medium"]).toMatchObject({
used: 400,
total: 1000,
remainingPercentage: 60,
});
expect(usage.quotas["gemini-3.8-flash-low"]).toMatchObject({
used: 650,
total: 1000,
remainingPercentage: 35,
});
});
});

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@@ -69,13 +69,13 @@ describe("antigravity computeRetryDelay hook (D3)", () => {
it("registry uses the daily IDE cloudcode host and user agent", () => {
expect(antigravity.transport.baseUrls).toEqual(["https://daily-cloudcode-pa.googleapis.com"]);
expect(antigravity.transport.headers["User-Agent"]).toBe("antigravity/ide/2.1.1 darwin/arm64");
expect(antigravity.transport.headers["User-Agent"]).toBe("antigravity/ide/2.11.0 darwin/arm64");
});
it("buildHeaders matches official IDE stream headers", () => {
ag._lastSessionId = "sess-123";
const h = ag.buildHeaders({ accessToken: "tok" }, true);
expect(h["User-Agent"]).toBe("antigravity/ide/2.1.1 darwin/arm64");
expect(h["User-Agent"]).toBe("antigravity/ide/2.11.0 darwin/arm64");
expect(h["Content-Type"]).toBe("application/json");
expect(h["Authorization"]).toBe("Bearer tok");
expect(h).not.toHaveProperty("X-Machine-Session-Id");

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@@ -23,7 +23,7 @@ describe("Antigravity usage headers", () => {
expect(proxyAwareFetch).toHaveBeenCalledTimes(2);
for (const [, options] of proxyAwareFetch.mock.calls) {
expect(options.headers["User-Agent"]).toBe("antigravity/ide/2.1.1 darwin/arm64");
expect(options.headers["User-Agent"]).toBe("antigravity/ide/2.11.0 darwin/arm64");
expect(options.headers).not.toHaveProperty("x-request-source");
}
});

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@@ -0,0 +1,36 @@
import { describe, it, expect } from "vitest";
import { getCapabilitiesForModel } from "../../open-sse/providers/capabilities.js";
import antigravityRegistry from "../../open-sse/providers/registry/antigravity.js";
import geminiRegistry from "../../open-sse/providers/registry/gemini.js";
import { MODEL_PRICING } from "../../open-sse/providers/pricing.js";
describe("Gemini 3.8 Flash Support & Config", () => {
it("registers gemini-3.8-flash tiered models in antigravity provider registry", () => {
const agIds = antigravityRegistry.models.map(m => m.id);
expect(agIds).toContain("gemini-3.8-flash-high");
expect(agIds).toContain("gemini-3.8-flash-medium");
expect(agIds).toContain("gemini-3.8-flash-low");
expect(agIds).toContain("gemini-3.8-flash");
});
it("registers gemini-3.8-flash in gemini provider registry", () => {
const geminiIds = geminiRegistry.models.map(m => m.id);
expect(geminiIds).toContain("gemini-3.8-flash");
});
it("resolves capabilities correctly for gemini-3.8 models with official limits", () => {
const caps = getCapabilitiesForModel("antigravity", "gemini-3.8-flash-high");
expect(caps.vision).toBe(true);
expect(caps.reasoning).toBe(true);
expect(caps.thinkingFormat).toBe("gemini-level");
expect(caps.contextWindow).toBe(1048576);
expect(caps.maxOutput).toBe(65536);
});
it("defines pricing matching gemini-3.7-flash baseline", () => {
expect(MODEL_PRICING["gemini-3.8-flash"]).toEqual(MODEL_PRICING["gemini-3.7-flash"]);
expect(MODEL_PRICING["gemini-3.8-flash-high"]).toEqual(MODEL_PRICING["gemini-3.7-flash-high"]);
expect(MODEL_PRICING["gemini-3.8-flash-medium"]).toEqual(MODEL_PRICING["gemini-3.7-flash-medium"]);
expect(MODEL_PRICING["gemini-3.8-flash-low"]).toEqual(MODEL_PRICING["gemini-3.7-flash-low"]);
});
});

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@@ -0,0 +1,100 @@
import { afterEach, describe, expect, it, vi } from "vitest";
import { createRequire } from "node:module";
import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";
import { getModelUpstreamId } from "../../open-sse/config/providerModels.js";
import { AntigravityExecutor } from "../../open-sse/executors/antigravity.js";
import { applyThinking, stripThinkingSuffix } from "../../open-sse/translator/concerns/thinkingUnified.js";
import gemini from "../../open-sse/providers/registry/gemini.js";
import { MODEL_PRICING } from "../../open-sse/providers/pricing.js";
import { MITM_TOOLS } from "../../src/shared/constants/cliTools.js";
const require = createRequire(import.meta.url);
const mitmConfig = require("../../src/mitm/config.js");
const here = dirname(fileURLToPath(import.meta.url));
afterEach(() => {
vi.restoreAllMocks();
});
describe("Gemini 3.8 Antigravity tiers", () => {
it.each(["high", "medium", "low"])(
"maps the %s tier to the shared upstream model with matching thinking level",
(tier) => {
const publicModel = `gemini-3.8-flash-${tier}`;
const upstreamModel = getModelUpstreamId("ag", publicModel);
const body = {
model: stripThinkingSuffix(upstreamModel),
request: {
contents: [{ role: "user", parts: [{ text: "hello" }] }],
generationConfig: {},
},
};
applyThinking("antigravity", upstreamModel, body, "antigravity");
const finalBody = new AntigravityExecutor().transformRequest(
publicModel,
body,
true,
{ projectId: "project", connectionId: "connection" }
);
expect(upstreamModel).toBe(`gemini-3.8-flash-${tier}(${tier})`);
expect(finalBody.model).toBe(`gemini-3.8-flash-${tier}`);
expect(finalBody.request.generationConfig.thinkingConfig).toEqual({
thinkingLevel: tier,
includeThoughts: true,
});
}
);
});
describe("Gemini 3.8 MITM model extraction", () => {
it.each(["high", "medium", "low"])("extracts the %s thinking tier for gemini-3.8-flash-tiered", (tier) => {
const body = Buffer.from(JSON.stringify({
request: { generationConfig: { thinkingConfig: { thinkingLevel: tier } } },
}));
expect(mitmConfig.extractModel(
"/v1internal/models/gemini-3.8-flash-tiered:streamGenerateContent",
body
)).toBe(`gemini-3.8-flash-${tier}`);
});
it("defaults invalid or missing thinking levels to medium", () => {
const body = Buffer.from(JSON.stringify({
request: { generationConfig: { thinkingConfig: { thinkingLevel: "unknown" } } },
}));
expect(mitmConfig.extractModel(
"/v1internal/models/gemini-3.8-flash-tiered:streamGenerateContent",
body
)).toBe("gemini-3.8-flash-medium");
});
});
describe("Gemini 3.8 MITM tools and catalog", () => {
it("includes gemini-3.8-flash tiers in MITM_TOOLS defaultModels", () => {
const defaultModelIds = MITM_TOOLS.antigravity.defaultModels.map((m) => m.id);
expect(defaultModelIds).toContain("gemini-3.8-flash-high");
expect(defaultModelIds).toContain("gemini-3.8-flash-medium");
expect(defaultModelIds).toContain("gemini-3.8-flash-low");
});
it("exposes the direct Gemini 3.8 API models and pricing", () => {
const ids = gemini.models.map((model) => model.id);
expect(ids).toContain("gemini-3.8-flash");
expect(MODEL_PRICING["gemini-3.8-flash"]).toMatchObject({ input: 1.5, output: 7.5 });
});
it("keeps the standalone CLI Antigravity catalog synchronized", () => {
const source = readFileSync(join(here, "../../cli/src/cli/menus/providers.js"), "utf8");
const agCatalog = source.match(/\n ag: \[([\s\S]*?)\n \],/)?.[1] || "";
expect(agCatalog).toContain("gemini-3.8-flash-high");
expect(agCatalog).toContain("gemini-3.8-flash-medium");
expect(agCatalog).toContain("gemini-3.8-flash-low");
});
});